Why is the value listed for atomic mass for each element on the periodic table not a whole number?
a. it is an average.
b. it is a measurement error.
c. the numbers of protons can vary for an element.
d. the number of electrons can vary for an element.

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.

The answer to this is the 3rd choice!

As cooking food that has to go in the oven