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Valence Electrons of Elements

10. Periodic Properties of the Elements / Valence Electrons of Elements / 문제 4

문제 4

How many number of valence electrons each of the following elements possess.
Sn
Al
P
Br

A

3, 4, 5, 7

B

4, 3, 5, 7

C

7, 5, 4, 3

D

4, 5, 3, 7