[sydneymarsolek]

Which statement is true about half-lives?
a.
Different atoms of the same element have different half-lives.
b.
Each radioactive isotope has its own half-life.
c.
All radioactive nuclides of an element have the same half-life.
d.
All radioactive nuclides have the same half-life.

Please help me!!

[Perito]

Which statement is true about half-lives?

a. Different atoms of the same element have different half-lives.
b. Each radioactive isotope has its own half-life.
c. All radioactive nuclides of an element have the same half-life.
d. All radioactive nuclides have the same half-life.

a. Different isotopes of the same element have different half-lives so this is false.
b. This is true
c. Different isotopes of the same element may be radioactive and each isotope has its own half-life so this is false.
d. This is absurd. Some nuclides have half-lives measured in years or centuries; others have half-lives measured in seconds. So, it must be false.