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प्रश्न
Write the chemical formula of the following compound in a step-by-step manner –
Copper [I] sulphide
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उत्तर
Write the formula of
| Copper [I] sulphide | Symbol | Valency |
| Copper | \[\ce{Cu}\] | \[\ce{1^{+}}\] |
| Sulphide | \[\ce{S}\] | \[\ce{2^{-}}\] |
Step I – Write each symbol with its valency.
Positive ion is written first
\[\ce{Cu}^{1+}\] \[\ce{S}^{2-}\]
Step II – Interchange the valencies ignoring the signs.
The Formula is \[\ce{Cu2S}\]
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