Chapter 2 Hon. Chem.

Question 1

Atomic Theory 3 Postulates

Answer 1

1. All matter is made up of atoms
2. Matter is neither created nor destroyed
3. Compounds are formed from elements

Question 2

Electron
discovery, charge, position

Answer 2

J. J. Thompson, negative one charge, orbits the nucleus

Question 3

Proton
discovery, charge, position

Answer 3

Rutherford, positive one charge, nucleus

Question 4

Define all parts of a nuclear symbol

Answer 4

a a=mass#
X X=element
z z=atomic#

Question 4

Neutron
discovery, charge, position

Answer 4

Rutherford, neutral charge, nucleus

Question 5

Identify all forms of radiation

Answer 5

Beta (β): electron
Alpha (α): Helium+2 ion
Gamma (γ): energy

Question 6

Molecules

Answer 6

Nonmetal/Nonmetal
Covalent bonds
Non-electrolyte (no conduct electricity)
Alcohol and Amines

Question 7

Ionic compounds

Answer 7

Metal/Nonmetal
Ionic bonds
electrolyte

Question 8

Isotopes vs Isobars

Answer 8

Isotopes: Same atomic number, different mass number (#neutrons differ)
Isobars: Different elements/atoms, same mass number