Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Use Mendeleev’s periodic table to predict the formula of hydrides of carbon and silicon.

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hydrides of any element of group IV are written as ${\text{RH}}_4$, here, R is an element of that group.
Since Carbon and Silicon belong to the same group IV thus, the formula of hydride of carbon is ${\text{CH}}_4$ and silicon is ${\text{SiH}}_4$.