MCQ Questions

Question No. 1

Atomic number is equal to

Answer :

Number of protons in the nucleus of an atom

Number of neutrons in atom

Number of electrons and neutrons

Number of protons and neutrons

Question No. 2

The number of valence electrons present in sodium is

Answer :

One

two

three

zero

Question No. 3

The sub-atomic particle with positive charge is

Answer :

Proton

Neutron

Electron

Nucleon

Question No. 4

What was the conclusion drawn by Thomson after his experiment on cathode ray?

Answer :

Atoms consist of protons and neutrons inside the nucleus

Atoms consist of electrons

Atoms consist of electrons, protons and neutrons

Atoms consist of electrons in continuous motion around the positively charged spherical mass

Question No. 5

The sub-atomic particle with positive charge is

Answer :

Proton

Neutron

Electron

Nucleon

Question No. 6

An alpha particle is also known as ................ .

Answer :

Subatomic particle

an unionised helium atom

a neutral particle

a doubly charged helium ion

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