ATOMS AND MOLECULES

Who named the smallest particles are called Parmanu

• Kanada

• Katyayama

• Lavoiser

• Dalton

What are the building blocks of all matter

• Atoms

• Molecules

• Both A and B

• Only A

Atomic radius is measured in

• Centimetre

• Millimetre

• Nanometer

• Kilometre

The symbol of chlorine is

• CL

• cL

• Cl

• Chl

The Latin name of gold

• Auram

• Natrium

• Kalium

• None

One atomic mass unit is a mass unit equal to exactly Carbon

• 1/16th

• 1/12th

• 1/10th

• 1/14th

The number of atoms constituting a molecule is known as its

• Element

• Compound

• Ions

• Atomicity

The formula of baking powder

• NaH CO3

• _{Na2 CO3}

• NanO3

• Na2SO4

Calculate the molecular mass of HNO3

• 68U

• 42U

• 63U

• 65U

Calculate the formula unit mass of ZnO

• 76U

• 38U

• 83U

• 81U