Question

A toxic chemical decays with a half-life of 10 years, so half of it will be gone in 10 years from now and all the rest will be gone 20 years from now.

1.True 2.False

Answer 1

False

Explanation:

because according to question half life of the toxic chemical will decay in 10 yrs from now and the remaining half life of the toxic chemical will decay in 10 yrs from than onwards when the first time span of 10yrs will be completed.

i.e the half statement "the rest will be gone 20 years from now." is incorrect as it says the rest will be gone in 20yrs from now, because the complete portion of toxic chemical will decay in 20yrs from now not half portion.