Question

The half-life of a radioisotope

a
gets shorter with time

b
is constant

c
get shorter with increasing temperature

d
decreases by a factor of two each time
e
become longer over time

Answer 1

b is constant

Step-by-step explanation:

The half-life of a radioisotope is constant throughout its life cycle.

Half-life is the time taken for half of the radioactive nuclei to disintegrate.

Every radionuclide has its characteristic half-life and it is independent of the number of radioactive atoms.

• The half-life does not depend on any variable. It is an inherent property of a radioactive isotope.
• The shorter the half-life, the faster a radionuclide decays.
• Nuclides with a long half life are fairly stable for a long period of time.
• The decay of a radioactive element is usually characterized by its half-life.

Therefore, the most ideal statement about half-life is that it is constant.