Question

an atomic is having 5 neutrons and the mass number for the same is 19 . calculate it valency. please answer​

Answer 1

Answer:

4

Explanation:

ATQ,

No. of neutrons = 5

Mass no. = 19 ( no. of neutrons + no. of protons )

No. protons = 19 - 5

= 14

For valency,

No. of electrons = No. of protons

= 14

Electronic Configuration of this atom = 2,8,4

No. of valence electrons = 4

Hence,

Valency = 4