Chemistry Midterm Review 2

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Value representing the number of protons in an element

• Atomic Mass
• Mass Number
• Valence Electrons
• Atomic Number

How many neutrons does Chlorine have?

• 18

• 17

• 35

• 52

What is the atomic mass of Neon?

• 10

• 20

• 30

Which type of nuclear radiation is being emitted here?

• Alpha
• beta
• gamma 
• none

Solve this equation for alpha decay.
₈₅²⁰⁹At = ___ + ₂⁴He

• ₈₃²⁰⁵Bi
• ₈₆²⁰⁹Rn
• ₈₁²⁰⁷Tl
• ₈₅²⁰⁸At

Has the highest penetrating power.  Can penetrate our body.  Even several cm thick of lead or several meters thick of concrete cannot stop all of it.

• Alpha
• Beta
• Gamma

Who discovered the nucleus of the atom?

• Dalton

• Thomson

• Rutherford

• Bohr

Who discovered the subatomic particle "electron"?

• Dalton

• Thomson

• Rutherford

• Bohr

Dalton's model of the atom is represented by which letter?

• A

• B

• C

• D

• E