Question

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

Potassium permanganate

Answer 1

Write the formula of

Potassium permanganate	Symbol	valency
Potassium	\[\ce{K}\]	\[\ce{1^+}\]
permanganate	\[\ce{MnO4}\]	\[\ce{1^-}\]

Step I – Write each symbol with its valency.
Positive ion is written first
\[\ce{K}^{1+}\]  \[\ce{[MnO4]}^{1-}\]
Step II – Interchange the valencies and ignoring the (+) and (−) signs.

The Formula is \[\ce{KMnO4}\]