Nuclear Chemistry

When the isotope ⁵⁰₂₄X releases an alpha particle we get another element Y that looks like

• ⁵⁰₂₂Y

• ⁴⁶₂₂Y

• ⁴⁸₂₀Y

• ⁵⁴₂₆Y

When the isotope ⁵⁰₂₄X releases a beta particle we get another element, Y, that looks like

• ⁵⁰₂₃Y

• ⁴⁶₂₂Y

• ⁵⁰₂₅Y

• ⁵⁰₂₄Y

What is meant by the statement that ³²₁₅P has a half life of 14 days

• It takes 7 days to go down to 50% radioactivity each time

• It takes 14 days to lose 50% of its current isotope

• After 14 days it starts to become less radioactive

• It takes 14 days to go up by 50% radioactivity each time

Which type of nuclear radiation is being emitted here?

• Alpha
• beta
• gamma 
• none

Which type of radioactive decay gives off energy only (no particles)?

• alpha

• beta

• gamma

Complete the nuclear equation and determine the type of decay that is occurring in this reaction.

• alpha, ⁴₂He

• beta, ⁰_-1e

• gamma

• none

The time taken for half of an amount of radioactive atoms to decay.

• Nuclear fusion
• Full-life
• Dead time
• Half-life

Gamma rays have a _____ charge

• 0
• +1
• -1
• +2

Alpha particles have a _____ charge.

• +2
• 0
• +1
• -1

The technetium-99 isotope has a half-life of 6.0 hours. If 100.0 mg were injected into a patient how much remains after 18 hours?

• 33.0 mg
• 12.5 mg
• .33 mg
• 15.8 mg