An element X with electronic configuration 2,8,2 ionises to a configuration of 2,8 when it combines with another element Y of configuration 2,8,7?

Question

(i) state the type of bonding formed between the two elements.
(ii) write a simple ionic equation to represent the ionization of X.
(iii) How many atom/atoms of Y are needed for the comibnation?
(iv) Which of the two atoms has the higher electronegativity.
(v) Name one element that X could combine with in a / to / ratio.

Answer 1

An element X with electronic configuration 2,8,2 ionises to a configuration of 2,8 when it combines with another element Y of configuration 2,8,7?
(i) state the type of bonding formed between the two elements.
(ii) write a simple ionic equation to represent the ionization of X.
(iii) How many atom/atoms of Y are needed for the combination?
(iv) Which of the two atoms has the higher electronegativity.
(v) Name one element that X could combine with in a / to / ratio.
(i) ionic
(ii) X --> X^2+ + 2e
(iii) Y + e ==> Y^- so two atoms of Y are needed to combine with 1 atom X.
(iv) Probably X is Mg. Probably Y is Cl. Cl could combine in a 1:2 ratio to form MgCl2