Which two elements have the same number of valence electrons?

Na and Sr
Zr and H
O and S
Mg and P

Herbivores, carnivores, omnivores, decomposers, herbivores

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.