Chemistry Test

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Anonymous
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198522
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Chemistry Test
Updated:
2013-02-06 21:14:57
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atomic theory history suzanna arul
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  1. 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. 
  2. Who is John Dalton?
    He created the Atomic Theory
  3. Who is Henri Bequerel?
    He began the study of radiation, and discovered x rays.
  4. Who is Joseph John Thompson?
    He was known for the plum pudding model and experimented with cath-o-ray tube. 
  5. Who is Ruthford? 
    Known for Gold-Foil experiment. Concluded that atoms have a nucleus with a positive charge.
  6. Who is Bohr?
    Known for Bohr modle stated electrons orbited in circular pattern around atoms in various levels.
  7. What is Schrodinger known for?
    • Known for Quantum Mechanical Model.
    • Electrons spinning clock-wise and anti-clockwise.
  8. Who was James Chadwick?
    He discovered neutrons by performing experiments of smashing particles together.
  9. 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
  10. 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
  11. 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
  12. 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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