Question

Write the chemical formula of the following compound in a step-by-step manner –

Potassium chloride

Answer 1

Write the formula of

Potassium chloride	Symbol	Valency
Potassium	\[\ce{K}\]	\[\ce1^+\]
Chloride	\[\ce{Cl}\]	\[\ce1^-\]

Step I – Write each symbol with its valency.
\[\ce{K}^{1+}\]  \[\ce{Cl}^{1-}\]
Positive ion is written first

Step II – Interchange the valencies

and Ignore 1 in KCl
Therefore Formula is KCl