Question.
Use Mendeleev’s periodic table to predict the formulae for the oxides of the following elements: K, C, Al, Si, Ba.
Use Mendeleev’s periodic table to predict the formulae for the oxides of the following elements: K, C, Al, Si, Ba.
solution:
Limitations of Newlands’ law of octaves:
$\mathrm{K}$ is in group 1. Therefore, the oxide will be $\mathrm{K}_{2} \mathrm{O}$.
$\mathrm{C}$ is in group 4 . Therefore, the oxide will be $\mathrm{CO}_{2}$.
$\mathrm{Al}$ is in group $3 .$ Therefore, the oxide will be $\mathrm{Al}_{2} \mathrm{O}_{3}$.
$\mathrm{Si}$ is in group 4. Therefore, the oxide will be $\mathrm{SiO}_{2}$.
$\mathrm{Ba}$ is in group 2 . Therefore, the oxide will be $\mathrm{BaO}$.
Limitations of Newlands’ law of octaves:
$\mathrm{K}$ is in group 1. Therefore, the oxide will be $\mathrm{K}_{2} \mathrm{O}$.
$\mathrm{C}$ is in group 4 . Therefore, the oxide will be $\mathrm{CO}_{2}$.
$\mathrm{Al}$ is in group $3 .$ Therefore, the oxide will be $\mathrm{Al}_{2} \mathrm{O}_{3}$.
$\mathrm{Si}$ is in group 4. Therefore, the oxide will be $\mathrm{SiO}_{2}$.
$\mathrm{Ba}$ is in group 2 . Therefore, the oxide will be $\mathrm{BaO}$.