Question

name of an element is p . its mass number is 30 and atomic number is 15 . find out its period and group number , its atomic valence electron , and valency . find out its proton , electron and neutron number

Answer 1

Answer:

Phosphorus, period- 3, group- 15, valence electron- 5, valency- 3,5 , proton- 15, electron- 15, neutron- 17

hope this helps u

Answer 2

Period number-3

Group number-15

Atomic valence electron=[Ne] 3s² 3p³

Velency=+3

Electrons=15

Protons=15

Neurons=16

Explanation:

Phosphorus is a chemical element with the symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth.