EASY
7th ICSE
IMPORTANT
Earn 100

The valency of sodium is one. Write the molecular formula for the following compounds of sodium.

sodium hydroxide.

Important Questions on Atoms, Molecules and Radicals

EASY
7th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>EXERCISE>Q 10

The valency of sodium is one. Write the molecular formula for the following compounds of sodium.

Sodium nitrate.

EASY
7th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>EXERCISE>Q 11
What is variable valency? Give two examples of elements showing variable valency.
EASY
7th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>EXERCISE>Q 12

Give the group number of the following element present in the periodic table.

Magnesium

EASY
7th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>EXERCISE>Q 12

Give the group number of the following element present in the periodic table.

Carbon

EASY
7th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>EXERCISE>Q 12

Give the group number of the following element present in the periodic table.

Sulphur

EASY
7th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>EXERCISE>Q 12

Give the group number of the following element present in the periodic table.

Neon

EASY
7th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>EXERCISE>Q 13
An element belongs to group VA. What would be its valency? Name two such elements.
MEDIUM
7th ICSE
IMPORTANT
Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>EXERCISE>Q 14
An element belongs to group II. What would be its valency? Write the formulae of molecules of compounds it will form with elements in VA, VIA and VIIA groups.