Question

4. An 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.
Define the form​

Answer 1

Answer  a)Al

b) p = 13, e = 13 and n = 13

c) 2,8,3 so its valency = 3

Explanation: