What do we mean by the half-life of a radioactive isotope?

The half-life of a radioactive isotope is the amount of time it takes for the radioactive isotope to decrease to half of it's starting value.

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.

Aconductor easily transfer heat