Answer:
(a) Cl
[tex]1s^22s^22p^63s^23p^5[/tex]
(b) Si
[tex]1s^22s^22p^63s^23p^2[/tex]
(c) Sr
[tex]1s^22s^22p^63s^23p^63d^{10}4s^24p^65s^2[/tex]
Explanation:
(a) Cl
Atomic number = 17
The electronic configuration is -
[tex]1s^22s^22p^63s^23p^5[/tex]
(b) Si
Atomic number = 14
The electronic configuration is -
[tex]1s^22s^22p^63s^23p^2[/tex]
(c) Sr
Atomic number- 38
The electronic configuration is -
[tex]1s^22s^22p^63s^23p^63d^{10}4s^24p^65s^2[/tex]
