Discovery of the Structure of the Atom.pptx
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1. The document discusses the history of discoveries that led to the modern understanding of the structure of the atom. 2. It describes early Greek ideas of atoms as indivisible particles and the development of the concept of the atom by John Dalton in 1803, who proposed that atoms are small, hard spheres that combine to form compounds. 3. The discovery of the electron by J.J. Thomson in 1897 showed that atoms have internal structure and are not indivisible, while Ernest Rutherford's 1908 gold foil experiment demonstrated that atoms have a small, dense nucleus.
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Dear Democritus...
1) The document traces the history of atomic theory from ancient Greece to modern times, starting with Democritus' idea of atoms that was rejected by Aristotle.
2) In the 1600s, chemistry emerged as a science, with Antoine Lavoisier distinguishing elements and compounds. John Dalton further developed atomic theory in 1803, proposing atoms of different elements have different properties.
3) Ernest Rutherford's 1909 gold foil experiment discovered the atomic nucleus, replacing the plum pudding model and showing atoms have mostly empty space. This led to models placing electrons in distinct orbits around the nucleus.
Atomic Models: Everything You Need to Know
The document traces the development of atomic models from ancient Greek philosophers to modern quantum mechanics. It describes early ideas that atoms were indivisible spheres (Democritus), John Dalton's model of atoms as hard spheres, J.J. Thomson's "plum pudding" model with electrons in a positively charged substance, Ernest Rutherford's discovery of the nucleus from his gold foil experiment, Niels Bohr's model with electrons in specific energy levels around the nucleus, and the modern wave model where electrons exist as probability clouds.
presentation on physics-atommodels-.pptx
This is about atomic model of chemistry. There have atomic structure. And all the history of atomic model.
Atom models
1) Early models proposed atoms as indivisible particles (Democritus). Dalton later showed atoms of different elements have different properties.
2) Thomson's "plum pudding" model showed atoms contain smaller, negatively charged particles (electrons) scattered in a positive sphere.
3) Rutherford's gold foil experiment revealed atoms have small, dense nuclei containing mass, with electrons orbiting at distances.
4) Bohr's model placed electrons in specific energy levels around the nucleus, like planets orbiting the sun. Modern models use wave mechanics.
Atomic Theory
Atomic theory describes matter as composed of atoms, the basic units that constitute chemical elements. Democritus first proposed the idea of indivisible atoms in ancient Greece. In the early 1900s, J.J. Thomson discovered the electron and proposed a "plum pudding" model of the atom. Ernest Rutherford discovered the nucleus through alpha particle scattering experiments, leading to the planetary model of electrons orbiting the nucleus. Niels Bohr later adjusted this model to account for electron stability.
Atomos
The document traces the development of atomic theory over time from ancient Greek philosophers to modern models. It describes Democritus' idea that matter is made of indivisible particles called "atomos", Dalton's atomic theory of elements composed of atoms, J.J. Thomson's "plum pudding" model showing atoms contain smaller particles, Rutherford's gold foil experiment proving atoms have a small, dense nucleus, Bohr's model of electrons in specific energy levels orbiting the nucleus, and the modern wave model showing electrons as probability clouds rather than definite orbits.
Atomos[1]
The document traces the development of atomic theory over time from ancient Greek philosophers to modern models. It describes Democritus' idea that matter is made of indivisible particles called "atomos", Dalton's atomic theory of elements composed of atoms, J.J. Thomson's "plum pudding" model showing atoms contain smaller particles, Rutherford's gold foil experiment proving atoms have a small, dense nucleus, Bohr's model of electrons in specific energy levels orbiting the nucleus, and the modern wave model showing electrons as probability clouds rather than definite orbits.
Atomos
The document traces the development of atomic theory over time from ancient Greek philosophers to modern models. It describes Democritus' idea that matter is made of indivisible particles called "atomos", Dalton's model of atoms as indivisible spheres, Thomson's "plum pudding" model with electrons scattered in a positively charged substance, Rutherford's gold foil experiment showing atoms are mostly empty space with a dense nucleus, Bohr's model of electrons in specific energy levels orbiting the nucleus like planets, and the modern wave model where electrons exist as probability clouds rather than definite orbits.
Recommended
Dear Democritus...
1) The document traces the history of atomic theory from ancient Greece to modern times, starting with Democritus' idea of atoms that was rejected by Aristotle.
2) In the 1600s, chemistry emerged as a science, with Antoine Lavoisier distinguishing elements and compounds. John Dalton further developed atomic theory in 1803, proposing atoms of different elements have different properties.
3) Ernest Rutherford's 1909 gold foil experiment discovered the atomic nucleus, replacing the plum pudding model and showing atoms have mostly empty space. This led to models placing electrons in distinct orbits around the nucleus.
Atomic Models: Everything You Need to Know
The document traces the development of atomic models from ancient Greek philosophers to modern quantum mechanics. It describes early ideas that atoms were indivisible spheres (Democritus), John Dalton's model of atoms as hard spheres, J.J. Thomson's "plum pudding" model with electrons in a positively charged substance, Ernest Rutherford's discovery of the nucleus from his gold foil experiment, Niels Bohr's model with electrons in specific energy levels around the nucleus, and the modern wave model where electrons exist as probability clouds.
presentation on physics-atommodels-.pptx
This is about atomic model of chemistry. There have atomic structure. And all the history of atomic model.
Atom models
1) Early models proposed atoms as indivisible particles (Democritus). Dalton later showed atoms of different elements have different properties.
2) Thomson's "plum pudding" model showed atoms contain smaller, negatively charged particles (electrons) scattered in a positive sphere.
3) Rutherford's gold foil experiment revealed atoms have small, dense nuclei containing mass, with electrons orbiting at distances.
4) Bohr's model placed electrons in specific energy levels around the nucleus, like planets orbiting the sun. Modern models use wave mechanics.
Atomic Theory
Atomic theory describes matter as composed of atoms, the basic units that constitute chemical elements. Democritus first proposed the idea of indivisible atoms in ancient Greece. In the early 1900s, J.J. Thomson discovered the electron and proposed a "plum pudding" model of the atom. Ernest Rutherford discovered the nucleus through alpha particle scattering experiments, leading to the planetary model of electrons orbiting the nucleus. Niels Bohr later adjusted this model to account for electron stability.
Atomos
The document traces the development of atomic theory over time from ancient Greek philosophers to modern models. It describes Democritus' idea that matter is made of indivisible particles called "atomos", Dalton's atomic theory of elements composed of atoms, J.J. Thomson's "plum pudding" model showing atoms contain smaller particles, Rutherford's gold foil experiment proving atoms have a small, dense nucleus, Bohr's model of electrons in specific energy levels orbiting the nucleus, and the modern wave model showing electrons as probability clouds rather than definite orbits.
Atomos[1]
The document traces the development of atomic theory over time from ancient Greek philosophers to modern models. It describes Democritus' idea that matter is made of indivisible particles called "atomos", Dalton's atomic theory of elements composed of atoms, J.J. Thomson's "plum pudding" model showing atoms contain smaller particles, Rutherford's gold foil experiment proving atoms have a small, dense nucleus, Bohr's model of electrons in specific energy levels orbiting the nucleus, and the modern wave model showing electrons as probability clouds rather than definite orbits.
Atomos
The document traces the development of atomic theory over time from ancient Greek philosophers to modern models. It describes Democritus' idea that matter is made of indivisible particles called "atomos", Dalton's model of atoms as indivisible spheres, Thomson's "plum pudding" model with electrons scattered in a positively charged substance, Rutherford's gold foil experiment showing atoms are mostly empty space with a dense nucleus, Bohr's model of electrons in specific energy levels orbiting the nucleus like planets, and the modern wave model where electrons exist as probability clouds rather than definite orbits.
Atomos[1]
The document traces the development of atomic theory over time from ancient Greek philosophers to modern models. It describes Democritus' idea that matter is made of indivisible particles called "atomos", Dalton's atomic theory of elements composed of atoms, J.J. Thomson's "plum pudding" model showing atoms contain smaller particles, Rutherford's gold foil experiment proving atoms have a small, dense nucleus, Bohr's model of electrons in specific energy levels orbiting the nucleus, and the modern wave model showing electrons as probability clouds rather than definite orbits.
Atomic Structure Ppt
The document traces the development of atomic theory over time from ancient Greek philosophers to modern models. It describes Democritus' idea that matter is made of indivisible particles called "atomos", Dalton's atomic theory of elements composed of atoms, J.J. Thomson's "plum pudding" model showing atoms contain smaller particles, Rutherford's gold foil experiment proving atoms have a small, dense nucleus, Bohr's model of electrons in specific energy levels orbiting the nucleus, and the modern wave model showing electrons as probability clouds rather than definite orbits.
Atomos[1]
The document traces the development of atomic theory over time from ancient Greek philosophers to modern models. It describes Democritus' idea that matter is made of indivisible particles called "atomos", Dalton's atomic theory of elements composed of atoms, J.J. Thomson's "plum pudding" model showing atoms contain smaller particles, Rutherford's gold foil experiment proving atoms have a small, dense nucleus, Bohr's model of electrons in specific energy levels orbiting the nucleus, and the modern wave model showing electrons as probability clouds rather than definite orbits.
Atomic models
The document summarizes the development of atomic models from Democritus to Bohr. It discusses key contributors including Democritus proposing atoms, Dalton establishing the atomic theory, Thomson proposing the plum pudding model, Rutherford discovering the nucleus through the gold foil experiment, and Bohr refining the model by proposing fixed electron orbits.
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The document outlines the major contributors to the development of the atomic model from ancient Greek philosophers to modern physicists. It discusses Democritus' early atomic theory, followed by Lavoisier and Dalton's atomic theories in the 18th-19th centuries. It then focuses on 20th century scientists like J.J. Thomson, Ernest Rutherford, Niels Bohr, Erwin Schrodinger, and James Chadwick who made key discoveries that led to modern atomic structure, such as electrons, the nucleus, electron shells, and neutrons.
Interactive textbook ch. 11 introduction to atoms
1) The atomic theory has changed over time as scientists gathered new evidence and information. John Dalton proposed the first scientific atomic theory in 1803, stating that all matter is made of atoms that cannot be created, destroyed, or divided.
2) In the late 19th century, scientists like J.J. Thomson discovered smaller particles called electrons within atoms. Thomson proposed the "plum pudding" model where electrons were scattered throughout the atom.
3) Ernest Rutherford's gold foil experiment in 1909 showed that atoms have a small, dense nucleus at their center. This led to Rutherford's nuclear model of the atom. Niels Bohr later incorporated electron orbits into this model.
atomos POWERT POINT PRESENTATION FOR GRADE 8.ppt
The document summarizes the development of atomic theory over time from Democritus' idea of indivisible atoms in 400 BC to the current wave model. It describes key models including Thomson's plum pudding model, Rutherford's discovery of the nucleus from his gold foil experiment, Bohr's model of electrons in distinct orbits around the nucleus, and the modern wave model where electrons are described as existing in electron clouds or energy levels rather than distinct orbits.
atomos presentation. grade 11 lesson.ppt
The document summarizes the development of atomic theory over time from Democritus' idea of indivisible atoms in 400 BC to the current wave model. It describes key models including Thomson's plum pudding model, Rutherford's discovery of the nucleus from his gold foil experiment, Bohr's model of electrons in distinct orbits around the nucleus, and the modern wave model where electrons exist as probabilities in electron clouds. The location of electrons depends on their energy level rather than fixed orbits.
Atomic structure ppt
The document traces the development of atomic theory from ancient Greek philosophers to modern physics. Democritus first proposed that matter is made of indivisible "atoms" around 400 BC. In the early 1800s, John Dalton provided experimental evidence supporting atoms and proposed that atoms of different elements have different properties. In the late 1800s and early 1900s, experiments by J.J. Thomson, Ernest Rutherford, and Niels Bohr led to discoveries of the electron and development of the nuclear model of the atom. Today's atomic model is based on quantum mechanics and depicts electrons as existing in electron clouds or energy levels rather than definite orbits.
Atomic theory notes
This document provides an overview of the development of atomic theory from ancient Greek philosophers to modern atomic structure. It summarizes key contributors and discoveries:
- Democritus proposed atoms as indivisible particles (5th century BC). John Dalton's atomic theory (1803) stated all matter is made of atoms that cannot be created, destroyed, or divided.
- J.J. Thomson's discovery of the electron (1897) showed atoms can be divided. Ernest Rutherford's gold foil experiment (1909) demonstrated atoms are mostly empty space with a dense nucleus.
- Niels Bohr's model (1913) showed electrons orbiting the nucleus in defined energy levels. Modern atomic theory describes electrons in
Atomos (1)
The atomic model has changed significantly over time based on new evidence and experiments. Early philosophers proposed that matter was made of indivisible particles called atoms. Modern atomic theory began with Dalton proposing atoms as indivisible spheres that combine to form compounds. Thomson's experiments showed atoms contain negatively charged electrons. Rutherford's gold foil experiment demonstrated atoms are mostly empty space with a small, dense positively charged nucleus. Bohr incorporated electrons orbiting the nucleus at set energy levels. Today's model depicts electrons in electron clouds around the nucleus due to their wave-like properties.
Atomic theory
Democritus first proposed the idea of atoms as indivisible particles in 460 BC. John Dalton updated atomic theory in 1803, proposing that atoms of each element are identical and that chemical reactions involve combinations of atoms. J.J. Thomson discovered electrons in 1897, changing the model to include negatively charged electrons orbiting the atom's nucleus. Ernest Rutherford discovered the nucleus through alpha particle scattering experiments in 1911. Niels Bohr incorporated quantum theory in 1913, proposing electrons orbit in discrete energy levels. Erwin Schrodinger modeled electrons as probability clouds in 1926. James Chadwick discovered neutrons in 1932, completing the standard nuclear model.
Lesson 4 Not Indivisible (The Structure of the Atom)
Learning Competencies
At the end of the lesson, you will have to:
1. point out the main ideas in the discovery of the structure of the atom and its subatomic particles
2. cite the contributions of J.J. Thomson, Ernest Rutherford, Henry Moseley, and Niels Bohr to the understanding of the structure of the atom
3. describe the nuclear model of the atom and the location of its major components (protons, neutrons, and electrons)
Atom History Timeline and Structure.ppt
1) Democritus first proposed that matter was made of indivisible particles called atoms in 400 BC.
2) In the early 1900s, Rutherford discovered the nucleus at the center of the atom through gold foil experiments.
3) Bohr improved on earlier atomic models by proposing that electrons orbit the nucleus in set energy levels.
Atomic models.ppt
The document traces the history of atomic models from ancient Greek philosophers to modern quantum mechanics. It describes key experiments and findings that led scientists like Dalton, Thomson, Rutherford, Bohr, and Schrödinger to develop successively more accurate models of the atom. Dalton proposed atoms as indivisible particles, Thomson discovered electrons within the atom, Rutherford found the dense nucleus through gold foil experiments, Bohr incorporated electron orbits, and Schrödinger introduced the wave-like electron cloud model still used today.
Atomic Theory & Structure
This document discusses the development of atomic theory from ancient Greece to modern times. It begins with Democritus' idea in 400 BC that matter is made of indivisible atoms. John Dalton expanded on this in 1803 with his Billiard Ball Model, proposing atoms as tiny invisible particles that make up elements. Ernest Rutherford discovered the nucleus in 1911 and protons in 1920 with his Planetary Model. Niels Bohr proposed fixed electron energy levels around the nucleus in 1913. Modern atomic theory incorporates Erwin Schrodinger's 1926 Electron Cloud Model and James Chadwick's 1932 discovery of neutrons in the nucleus.
atomos.ppt
The document summarizes the development of atomic theory over time from Democritus' idea of indivisible atoms to the current wave model. It describes early atomic models including Democritus, Dalton, Thomson's plum pudding model, Rutherford's gold foil experiment leading to the discovery of the nucleus, and Bohr's model of electrons in orbits around the nucleus. The modern wave model views electrons as existing in electron clouds or orbitals around the nucleus rather than defined orbits.
9th e himanshu chemistry project 19
J.J. Thomson discovered the electron in 1897 through experiments with cathode rays. He proposed the "plum pudding" model of the atom, where electrons were embedded in a uniform sphere of positive charge. Ernest Rutherford performed the gold foil experiment in 1909, which led him to propose the Rutherford model of the atom in 1911 - a small, dense nucleus surrounded by orbiting electrons. Neils Bohr improved on this model in 1913 by incorporating quantum theory, explaining the Rydberg formula for hydrogen spectra. In the Bohr model, electrons orbit in discrete energy levels and jump between them, emitting or absorbing photons of specific frequencies.
8th chemistry atomicstructure
The document summarizes the history of atomic structure models from Thomson's "plum pudding" model to Bohr's model. It describes key scientists' contributions, including:
- Thomson's discovery of the electron and proposal that atoms contain positive charge with electrons distributed throughout
- Rutherford's gold foil experiment which led him to propose a small, dense nucleus with electrons in orbits around it
- Bohr's refinement incorporating quantum theory, explaining electron energy levels and spectral lines
atomos.ppt
The document summarizes the development of atomic theory over time. It describes early atomic models proposed by Democritus, Dalton, Thomson, and Rutherford. Democritus proposed that matter is made of indivisible particles called atoms. Dalton established atoms as fundamental units of matter. Thomson's plum pudding model depicted atoms as positively charged spheres with electrons scattered within. Rutherford's gold foil experiment showed atoms have small, dense nuclei. The Bohr model depicted electrons orbiting the nucleus in distinct energy levels. Later, the quantum mechanical model depicted electrons as existing as clouds within an atom.
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The document outlines the major contributors to the development of the atomic model from ancient Greek philosophers to modern physicists. It discusses Democritus' early atomic theory, followed by Lavoisier and Dalton's atomic theories in the 18th-19th centuries. It then focuses on 20th century scientists like J.J. Thomson, Ernest Rutherford, Niels Bohr, Erwin Schrodinger, and James Chadwick who made key discoveries that led to modern atomic structure, such as electrons, the nucleus, electron shells, and neutrons.
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1) The atomic theory has changed over time as scientists gathered new evidence and information. John Dalton proposed the first scientific atomic theory in 1803, stating that all matter is made of atoms that cannot be created, destroyed, or divided.
2) In the late 19th century, scientists like J.J. Thomson discovered smaller particles called electrons within atoms. Thomson proposed the "plum pudding" model where electrons were scattered throughout the atom.
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atomos POWERT POINT PRESENTATION FOR GRADE 8.ppt
The document summarizes the development of atomic theory over time from Democritus' idea of indivisible atoms in 400 BC to the current wave model. It describes key models including Thomson's plum pudding model, Rutherford's discovery of the nucleus from his gold foil experiment, Bohr's model of electrons in distinct orbits around the nucleus, and the modern wave model where electrons are described as existing in electron clouds or energy levels rather than distinct orbits.
atomos presentation. grade 11 lesson.ppt
The document summarizes the development of atomic theory over time from Democritus' idea of indivisible atoms in 400 BC to the current wave model. It describes key models including Thomson's plum pudding model, Rutherford's discovery of the nucleus from his gold foil experiment, Bohr's model of electrons in distinct orbits around the nucleus, and the modern wave model where electrons exist as probabilities in electron clouds. The location of electrons depends on their energy level rather than fixed orbits.
Atomic structure ppt
The document traces the development of atomic theory from ancient Greek philosophers to modern physics. Democritus first proposed that matter is made of indivisible "atoms" around 400 BC. In the early 1800s, John Dalton provided experimental evidence supporting atoms and proposed that atoms of different elements have different properties. In the late 1800s and early 1900s, experiments by J.J. Thomson, Ernest Rutherford, and Niels Bohr led to discoveries of the electron and development of the nuclear model of the atom. Today's atomic model is based on quantum mechanics and depicts electrons as existing in electron clouds or energy levels rather than definite orbits.
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This document provides an overview of the development of atomic theory from ancient Greek philosophers to modern atomic structure. It summarizes key contributors and discoveries:
- Democritus proposed atoms as indivisible particles (5th century BC). John Dalton's atomic theory (1803) stated all matter is made of atoms that cannot be created, destroyed, or divided.
- J.J. Thomson's discovery of the electron (1897) showed atoms can be divided. Ernest Rutherford's gold foil experiment (1909) demonstrated atoms are mostly empty space with a dense nucleus.
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The atomic model has changed significantly over time based on new evidence and experiments. Early philosophers proposed that matter was made of indivisible particles called atoms. Modern atomic theory began with Dalton proposing atoms as indivisible spheres that combine to form compounds. Thomson's experiments showed atoms contain negatively charged electrons. Rutherford's gold foil experiment demonstrated atoms are mostly empty space with a small, dense positively charged nucleus. Bohr incorporated electrons orbiting the nucleus at set energy levels. Today's model depicts electrons in electron clouds around the nucleus due to their wave-like properties.
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Lesson 4 Not Indivisible (The Structure of the Atom)
Learning Competencies
At the end of the lesson, you will have to:
1. point out the main ideas in the discovery of the structure of the atom and its subatomic particles
2. cite the contributions of J.J. Thomson, Ernest Rutherford, Henry Moseley, and Niels Bohr to the understanding of the structure of the atom
3. describe the nuclear model of the atom and the location of its major components (protons, neutrons, and electrons)
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The document summarizes the history of atomic structure models from Thomson's "plum pudding" model to Bohr's model. It describes key scientists' contributions, including:
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- Bohr's refinement incorporating quantum theory, explaining electron energy levels and spectral lines
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- 1. DISCOVERY OF THE STRUCTURE OF THE ATOM OBJECTIVE: THE STUDENT WILL BE ABLE TO: 1.POINT OUT THE MAIN IDEAS IN THE DISCOVERY OF THE STRUCTURE OF THE ATOM II. THE STUDENTS WILL ABLE TO BE MORE CONFIDENT WITH HYPOTHETICAL THINKING THROUGH HOW THE IDEAS OF ATOM WERE FOUNDED
- 2. If you are to discover something. What would it be and why?
- 3. INDIVISIBLE • We will start with1800s in discussing the idea of the atom. However, its genesis or beginning actually started on ancient greece • The word ‘atom’ is from Ancient Greek that means ‘indivisible’. The Ancient Greek theory. This was attributed to Democritus (460–370 BC) and his mentor Leucippus
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- 5. 1803- JOHN DALTON • With the exception of isotopes • What are isotopes?
- 6. 1803- JOHN DALTON • He also came up with theories about how atoms combine to make compounds, and also came up with the first set of chemical symbols for the known elements.
- 7. RADIOACTIVITY •1896-Henri Becquerel discovered that certain minerals, such as uranium salts, emitted a new form of energy. Marie Curie coined the term radioactivity (from the Latin radius, meaning “ray”)
- 8. 1897- JOSEPH JOHN (JJ) THOMSON ATOMS ARE NOT INDIVISIBLE
- 9. HE CARRIED OUT EXPERIMENTS USING CATHODE RAYS PRODUCED IN A DISCHARGE TUBE, AND FOUND THAT THE RAYS WERE ATTRACTED BY POSITIVELY CHARGED METAL PLATES BUT REPELLED BY NEGATIVELY CHARGED ONES. FROM THIS HE DEDUCED THE RAYS MUST BE NEGATIVELY CHARGED.
- 11. • He Discovered the electron And called it “corpuscles” “Atoms were not indivisible, but had smaller constituent parts.”
- 12. 1904- • ‘The Plum Pudding Model’
- 14. 1908- ERNEST RUTHERFORD • a physicist from New Zealand who studied at Cambridge University under Thomson.
- 15. involved firing positively charged alpha particles at a thin sheet of gold foil. The alpha particles were so small they could pass through the gold foil
- 17. PLANETARY MODEL 1908- Ernest Rutherford
- 18. NIELS BOHR • He realized that classical physics could not properly explain what was going on at the atomic level; instead, he invoked quantum theory to try and explain the arrangement of electrons.
- 20. 1932- JAMES CHADWICK •discovered the existence of the neutron
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