Question

Write the full ground-state electron configuration for each:
(a) Cl (b) Si (c) Sr

Answer 1

Answer:

(a) Cl

$1s^22s^22p^63s^23p^5$

(b) Si

$1s^22s^22p^63s^23p^2$

(c) Sr

$1s^22s^22p^63s^23p^63d^{10}4s^24p^65s^2$

Explanation:

(a) Cl

Atomic number = 17

The electronic configuration is -  

$1s^22s^22p^63s^23p^5$

(b) Si

Atomic number = 14

The electronic configuration is -  

$1s^22s^22p^63s^23p^2$

(c) Sr

Atomic number- 38

The electronic configuration is -  

$1s^22s^22p^63s^23p^63d^{10}4s^24p^65s^2$