Q1 of 23 Page 34

The reason for the existence of isotopes is change in

The reason for the existence of isotopes is change in neutron number. For example:


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1

In the scattering experiment the deflection of alpha particle is due to

 1

The simplest atom that does not contain neutron is

 2

Fill in the blanks with suitable words:

The total number of protons and neutrons in the nucleus of an atom is known as ________ .

 2

Fill in the blanks with suitable words:

Almost all the mass of an atom is concentrated in a small region of space called the _______.