What happens to the mass number of a nucleus that emits an alpha particle?

The mass number decreases by four.

An α particle is the nucleus of a helium atom, ₂⁴He.

Thus, if a nucleus emits an alpha particle, its mass number decreases by four.

Happy new years every one

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.