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What is the Atomic Theory?
- 1. Elements are made of tiny particles
- 2. All atoms of a single element are identical
- 3. Atoms of one element are different from those of another.
- 4. Atoms of one element can combine with another to form a compound
- 5. Atoms are not created/destroyed just grouped in different ways.
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Who is John Dalton?
He created the Atomic Theory
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Who is Henri Bequerel?
He began the study of radiation, and discovered x rays.
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Who is Joseph John Thompson?
He was known for the plum pudding model and experimented with cath-o-ray tube.
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Who is Ruthford?
Known for Gold-Foil experiment. Concluded that atoms have a nucleus with a positive charge.
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Who is Bohr?
Known for Bohr modle stated electrons orbited in circular pattern around atoms in various levels.
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What is Schrodinger known for?
- Known for Quantum Mechanical Model.
- Electrons spinning clock-wise and anti-clockwise.
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Who was James Chadwick?
He discovered neutrons by performing experiments of smashing particles together.
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What is the charge, composition, effect on mass number and atomic number for an alpha particle.
- Charge: 2+
- Composition: 2 protons, 2 neutrons
- Effect on mass number: -4
- Effect on atomic number: -2
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What is the charge, composition, effect on mass number and atomic number for a beta particle?
- Charge: 1-
- Composition: 1 electron
- Effect on mass number: none
- Effect on atomic number: +1
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What is the charge, composition, effect on mass number and atomic number for a positron?
- Charge: 1+
- Composition: 1 positron (anti-electron)
- Effect on mass number: none
- Effect on atomic number: -1
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What is the charge, composition, effect on mass number and atomic number for a gamma ray?
- Charge: 0
- Composition: electromagnetic radiation
- Effect on mass number: none
- Effect on atomic number: none
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