Question

9) An element 'X' has atomic number 12.

(a) Name the element X

(d) Draw the Bohr model of the element X.

(b) Write its electronic configuration.

(c) What is its Valency?​

Answer 1

Answer:

Explanation:

(a) The element is Magnesium(Mg).

(b) Mg : (2,8,2) : 1$s^{2}$ 2$s^{2}$ 2$p^{6}$ $3s^{2}$

(c) It has 2 electrons in its outermost shell, o its valency is 2.

(d) 2 electrons in first shell, 8 electrons in second shell and 2 electrons in third shell.