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

In order of most to least penetrating radiation we have

• Alpha , Beta, Gamma

• Beta , Gamma , Alpha

• Gamma, Beta, Alpha

• Gamma, Alpha, Beta

The half life of Thorium-234 is 24 days. What fraction of the element remains after 96 days

• 1/2
• 1/4
• 1/8
• 1/16

Which type of nuclear radiation is being emitted here?

• Alpha
• beta
• gamma 
• none

Has the symbol

• Alpha
• Beta
• Gamma

Has the symbol

• Alpha
• Beta
• Gamma

Has the symbol

• Alpha
• Beta 
• Gamma

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

• alpha

• beta

• gamma