Question

Write the chemical formula of the compound sodium bromide in a step-by-step manner.

Answer 1

The symbol of sodium is ‘Na’ which is derived from the Latin word Natrium and have valency 1.

The symbol of bromide is ‘Br’ and its valency is 1^-.

Step 1 –

Write the formula of sodium bromide:

Symbol Valency

Sodium Na 1⁺

Bromide Br 1^-

Step 2 –

Write each symbol with its valency:

Na¹⁺ Br^1-

Step 3 –

Interchange the valencies:

$$\begin{gathered} \mathrm{Na}{\mathrm{Br}}^{} \\ \searrow \swarrow \\ {1}^{+}{1}^{-} \end{gathered}$$

The formula of the compound would be NaBr.