KNO₃ is:

The electrostatic force of attraction between atoms is called

The allotrope of carbon used for cutting glass:

When an element can exist in more than one structural form in the physical state, it is:

Materials that can return to their old shape after stretching are called:

The element having lowest  melting point is

Solder consists of:

Mendeleev ' s periodic table was based on

A pale yellow gas at room temperature which is dangerously reactive

The process in which metal is heated slowly and then cooled rapidly by plunging it into water is called: