Anita Sood, Anupama Bhandari, Madhabi Bose and, Shelly Wadhwa Solutions for Exercise 5: ASSESSMENT ZONE

Molecule is the smallest particle of a _____ (atoms/matter) that can exist independently.

A molecule of a compound is formed only when similar atoms combine together.

The chemical symbols of elements are the abbreviated forms of the names of the elements.

Combining capacity of an element is called its valency.

Valency of oxygen is $2$.

The number of atoms of each element should be same on each side of a balanced equation.

Name the compound having the chemical formula ${\mathrm{A}\mathrm{g}\mathrm{N}\mathrm{O}}_3$

Correct the following chemical formulae: $\mathrm{A}\mathrm{l}{\left(\mathrm{N}\mathrm{O}\right)}_3$

$\mathrm{A}: {\mathrm{Al}}_3{\left(\mathrm{NO}\right)}_3 \mathrm{B}: \mathrm{Al}{\left({\mathrm{NO}}_3\right)}_3 \mathrm{C}: {\mathrm{Al}}_2{\left({\mathrm{NO}}_3\right)}_3$ (Enter your correct answer as $\mathrm{A}, \mathrm{B} \mathrm{or} \mathrm{C}$)