Radioactive Decay

Uranium-238  decays into  Thorium-234  by emitting .........

• an alpha particle
• a beta particle
• gamma rays
• visible light

A helium nucleus with two protons and two neutrons is called a(n) ____.  

• alpha particle
• electroscope
• beta particle
• gamma ray

Which type of nuclear radiation is being emitted here?

• Alpha
• beta
• gamma 
• none

If we start off with element ₂₄X⁵⁰ after an alpha decay we get another element Y that looks like

• ₂₂Y⁵⁰
• ₂₂Y⁴⁶
• ₂₀Y⁴⁸
• ₂₆Y⁵⁴

If we start off with element ₂₄X⁵⁰ after an beta decay we get another element Y that looks like

• ₂₃Y⁵⁰
• ₂₂Y⁴⁶
• ₂₅Y⁵⁰
• ₂₄Y⁵⁰

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

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

Balance the following equation:
¹⁴₆C --> ⁰_-1e + ________

• ¹⁴₅B
• ¹⁴₆C
• ¹⁴₇N
• ⁴₂He

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

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

Gamma rays have

• no mass

• a huge mass

• a small mass

• an average mass

Has a mass of 0 and a charge of 0

• Alpha
• Beta
• Gamma