Question

An element 'x' has 10 electron, 10protons and 10 neutrons. what is the atomic number and the mass number of 'x'? Show its electronic configuration pictorically. will the element will be inert or reactivate?

Answer 1

Answer:

Atomic number = 10 (no. of protons)

Mass number =  20 (no. of protons + no. of neutrons)

Explanation:

No. of electrons = 10

No. of protons = 10

No. of neutrons = 10

Atomic number = 10 (no. of protons)

Mass number =  20 (no. of protons + no. of neutrons)

The element will be inert, because it's valence shell has 8 electrons.