ICSE ICSE Class 7 - CISCE Question Bank Solutions

Give the symbol and valency of the following element and radical.

Ammonium

Give the symbol and valency of the following element and radical.

Bicarbonate

Give the symbol and valency of the following element and radical.

Nitrate

Give the symbol and valency of the following element and radical.

Bisulphate

Give the symbol and valency of the following element and radical.

Bisulphite

Give the symbol and valency of the following element and radical.

Hydroxide

Give the symbol and valency of the following element and radical.

Carbonate

Give the symbol and valency of the following element and radical.

Sulphate

Give the symbol and valency of the following element and radical.

Sulphite

State what is meant by the term chemical formula.

Give the chemical formula of sodium hydroxide

Give the chemical formula of sodium nitrate

Give the chemical formula of sodium bicarbonate

Give the chemical formula of sodium sulphite

Give the chemical formula of magnesium nitrate

Give the chemical formula of ammonium sulphate

Give the chemical formula of carbonic acid

Give the chemical formula of calcium phosphate

State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.

Fill in the blank:

The element lithium in the Modern Periodic Table with valency 1⁺ belongs to the group ______.