Question

The valency and valence electrons of the atom with 17 protons and 18 neutrons. ​

Answer 1

K L M

(a) Valency = 8-7 = 1 [∵2, 8, 7] Atom needs 8 electrons to get stable.

(b) Mass number = Number of protons + Number of neutrons =17 + 18 =35

(c) Atomic number = Number of protons =17.