Question

element X has the mass number 27 and atomic number 13

(a) Write the symbolic representation of the element.

(b) Find the number of electrons, protons and neutrons in the element.

(c) The electronic configuration and valence of that element​

Answer 1

Explanation:

a) Al

b)electrons 13,protons 13,neutrons14

c)1s2 2s2 2p6 3s2 3p1

valency.....+3