The electron configuration of calcium is
a. 1s22s22p23s23p34s2.
b. 1s22s22p103s23p4.
c. 1s22s23s23p63d8.
d. 1s22s22p63s23p64s2.

20 Ca :

1s²,2s²,2p⁶,3s²,3p⁶, 4s²

Answer D

hope this helps!

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.

Hairy thick gross thing? idk