Question

Atomic no.of Al is 13 and mass no. is 27.Calculate the number of electrons,protons and neutrons.

Answer 1

Dear Student

No. of protons = Atomic no. of the element; thus here no. of proton = 13
No. of electron (in neutral gaseous atom) = No. of protons; thus here no. of electrons = 13
Mass no. = no. of protons + no. of neutrons; thus here no. of neutrons = 27 - 13 = 14