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Atoms are made up of protons, neutrons and electrons. Protons and neutrons are found in the nucleus and have a positive or neutral charge respectively. Electrons orbit the nucleus and have a negative charge. The number of protons determines the element, while the total number of protons and neutrons is the mass number. Isotopes are atoms of the same element with different numbers of neutrons. The periodic table arranges elements in order of atomic number.
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Punya devi
The document discusses the historical discovery of the internal structure of the atom. It notes that protons and neutrons have similar mass while electrons are much lighter, and that protons and electrons have equal but opposite charges while neutrons have no charge. The text then provides an example of analyzing the composition of a neutral boron-10 atom in terms of its protons, neutrons, and electrons. Finally, it states that chemical reactions involve electron transfer or sharing between atoms, so an element's chemical properties depend on the number of electrons in its atoms.
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The document discusses the modern understanding of the structure of atoms. It notes that atoms are made up of protons, neutrons, and electrons. Protons and neutrons are in the nucleus, while electrons orbit the nucleus. Protons have a positive charge, electrons have a negative charge, and neutrons have no charge. The number of protons determines the element, while the number of neutrons varies between isotopes of that element. Chemical properties are determined by the number of electrons in the outer shell of the atom.
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This document provides information about isotopes. It defines isotopes as atoms of the same element that have different numbers of neutrons. It discusses drawing atomic models showing protons, neutrons, and electrons. It explains that the number of protons defines the element, while the number of neutrons can vary between isotopes of the same element. The document includes sample isotope problems and exit slip questions for students to practice identifying isotopes based on atomic mass and number.
AP Chemistry - VSEPR
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The document discusses the historical discovery of the internal structure of the atom. It notes that protons and neutrons have similar mass while electrons are much lighter, and that protons and electrons have equal but opposite charges while neutrons have no charge. The text then provides an example of analyzing the composition of a neutral boron-10 atom in terms of its protons, neutrons, and electrons. Finally, it states that chemical reactions involve electron transfer or sharing between atoms, so an element's chemical properties depend on the number of electrons in its atoms.
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The document discusses the modern understanding of the structure of atoms. It notes that atoms are made up of protons, neutrons, and electrons. Protons and neutrons are in the nucleus, while electrons orbit the nucleus. Protons have a positive charge, electrons have a negative charge, and neutrons have no charge. The number of protons determines the element, while the number of neutrons varies between isotopes of that element. Chemical properties are determined by the number of electrons in the outer shell of the atom.
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1) Atoms are the basic units of matter and contain protons, neutrons, and electrons. Elements are substances made of only one type of atom, while compounds contain two or more different elements.
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Unit 1 lesson 12ppt
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The nucleus of an atom is identified by the number of protons it contains. Atoms of the same element have the same number of protons, but may have different numbers of neutrons, making them isotopes of that element. The strong nuclear force holds the protons and neutrons together in the nucleus despite their positive charges. Some nuclei are unstable if they have too many or too few neutrons. These unstable nuclei undergo radioactive decay, releasing particles or energy, to become more stable. This can result in the element changing, known as transmutation.
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1) Atoms are the basic units of matter and contain protons, neutrons, and electrons. Elements are substances made of only one type of atom, while compounds contain two or more different elements.
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- 1. ATOMIC STRUCTURE Across 2. negatively charged particle. 7. This attraction holds the atom together 8. A small particle that can't be broken into anything smaller. 10. This particle has no charge. 11. Electrons are found here. Down 1. This is the total number of proton and neutrons. 3. Positivelycharged particle. 4. Atoms with the same atomic number but different mass number. 5. Neutrons and protons are found here 6. This is the number of protons 7. Lots of atoms of the same type form 9. A table showing the order of element