Atoms and Molecules MCQ (Multiple Choice Questions) PDF Download

Protons in an atom ranges from

1. 1-122
2. 1-118
3. 118-11880
4. 18-218

Some of energy levels are not occupied by electrons as there are

1. more energy levels
2. more electrons
3. more protons
4. more neutrons

Revolving electrons present in various shells and surround the nucleus, exert a force on nucleus which is

1. force of repulsion
2. gravitational force
3. acceleration force
4. force of attraction

Revolving electrons present in various shells and surround the nucleus, exert a force on each other which is

1. gravitational force
2. acceleration force
3. force of repulsion
4. force of attraction

Element which is made up of one or more atoms combined together with the help of short-range forces of their electrical charges is called

1. atom
2. molecule
3. proton
4. compound