Atoms And The Nature
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The document discusses the structure and composition of atoms. Atoms are the smallest units that make up elements and compounds. They contain protons, neutrons and electrons. Protons are positively charged particles in the nucleus, neutrons have no charge, and electrons are negatively charged particles that orbit the nucleus. Different elements have different numbers of these subatomic particles. Atoms can exist alone or combine to form molecules. Living things are composed of complex nonliving molecules made up of atoms.
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2 contribution of john dalton martin
John Dalton's atomic theory proposed that all matter is composed of extremely small indivisible particles called atoms. He hypothesized that atoms of the same element are identical, while atoms of different elements differ in their properties. Dalton also suggested that atoms combine in fixed ratios to form compounds. His atomic theory provided an explanation for laws such as the law of conservation of mass and the law of definite proportions. Dalton's experiments helped establish the idea that atoms are the basic building blocks of all matter.
Periodic table (2)
A great presentation with good animations and attractive backgrounds.Helps in understanding the concept nicely.
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An atom is the smallest particle that defines a chemical element. It consists of a nucleus containing protons and neutrons, surrounded by electrons. The nucleus contains nearly all an atom's mass. Protons have a positive charge, electrons have a negative charge, and neutrons have no charge. Atoms of the same element can differ in the number of neutrons, forming isotopes like carbon-12 and carbon-14. Scientists like Dalton, Thompson, and Rutherford discovered the internal structure of atoms through experiments involving charged particles.
Isha deshpande 8 dahlia AVEMHS
An atom is the smallest particle that defines a chemical element. It consists of a nucleus containing protons and neutrons, surrounded by electrons. The nucleus contains nearly all an atom's mass. Protons have a positive charge, electrons have a negative charge, and neutrons have no charge. Atoms of the same element can differ in the number of neutrons, forming isotopes like carbon-12 and carbon-14. Scientists like Dalton, Thompson, and Rutherford discovered the internal structure of atoms through experiments involving charged particles.
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Atoms And The Nature
- 1. ATOMS AND THE NATURE OF THE MATTER
- 5. ATOM PROTONS: Positively charged particles in the nucleus NEUTRONS: Chargeless Particles in the nucleus ELECTRONS: Negatively charged particles on the certain energy levels around the nucleus
- 14. Size of Nucleus If the nucleus were “ 1 m ” in diameter, the atom would be 1.5 miles in diameter .
- 16. He is a noble gas. C is a solid substance which has relatively different properties than He.
- 17. WHY THEY ARE DIFFERENT ALLTOUGH THEY CONTAIN THE SAME PARTICLES ?
- 28. A Phytochemical in a Matrix The ascorbic acid molecule is exactly the same in Oranges or Violets, but is embedded in very different chemical matrices
- 29. Isobutylamides
Editor's Notes
- Illustrations: L: Foxglove, Digitalis purpurea R: Digitoxin, a cardiac glycoside (cardiac glycosides are derivatives of steroids)
- Illustrations: L: Orange, Citrus sinensis M: Violet, Viola spp. R: Ascorbic acid (reduced form; ascorbic acid is a type of organic acid)
- Illustrations: TL: Echinacea purpurea flower bud TR: Echinacea purpurea , full bloom [NGS/SWSBM] BL: an isobutylamide from Echinacea Spotlight: unusual triple carbon-carbon bonds make a straight region in the molecule BR: A line drawing of the same molecule Echinacea has ~ 12 different alkamides (isobutylamides are one type of alkylamide). High levels of alkamides accumulate in the roots & flowers of E. purpurea & E. angustifolia .
- Illustrations: L: Alliin, a cysteine sulfoxide & precursor of allicin M: Alliinase, the enzyme which transforms alliin into allicin R: Allicin, a thiosulfinate See: www.herbalchem.net (Garlic pages are in the archives) for detailed information on Garlic chemistry.
- Illustrations: L: Red Cabbage, Brassica oleracea var. capitata subgroup rubra M: Sweet Cherry, Prunus avium R: Onions, Allium cepa
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- Illustrations: TR: Hawthorne ( Crataegus spp.) [NGS/SWSBM] BR: Hawthorne berries Hyperin (aka hyperoside; quercetin-3-galactoside) is also found in St. Johnswort ( Hypericum perforatum ). It is a type of flavonol glycoside, which is a type of flavonoid, which is a type of polyphenol.