Matter & Chemical Formulae_Valency

Matter & Chemical Formulae_Valency

Fill in the Blanks

The number of

present in a molecule of an element is called its atomicity.

Fill in the Blanks

One

of water is made of two atoms of hydrogen and one atom of oxygen.

Multiple Choice

Each element is represented by a chemical ________________.

• number

• alphabet

• symbol

• formula

Multiple Choice

An atom consists of ____________________.

• a) Electrons and protons 

• b) Neutrons and electrons 

• c) Protons and neutrons 

• d) Electrons, proton and neutrons 

Open Ended

Quick Check

How are compounds formed?

Multiple Choice

Super Challenge:

The valency of which of the elements is zero?

• hydrogen

• helium

• oxygen

• carbon