Chemical Formula

The chemical symbol for nitrogen gas is

• ni

• N2

• N

• NI

The chemical symbol for sodium is

• so

• SO

• Na

• NA

valency of helium is

• 0

• 3

• 2

• 1

The molecular formula of potassium nitrate is ________.

• KNO

• KON

• KNO₃

• KNO₂

Atomic mass of sodium is

• 13

• 23

• 21

• 19

who presented the atomic theory

• Albert Einstein

• John Dalton

• Robert Hooke

• Marie Curie

The smallest particle of a substance is......

• atom

• element

• molecule

• compound

Atomicity is ......

• the number of atoms present in an element.

• the number of atoms present in a molecule.

• atomic mass

• none of the above

The bonding capacity of an element is called......

• Atomic number

• Atomic Mass Unit

• Molecular mass

• Valency

"In a compound, the elements always present in the fixed ratio of their mass." is a ....

• Law of constant proportion

• Law of conservation of mass

• Law of multiple proportion

• None of the above