Discovery of neutron

Question 1 Name the scientist who discovered neutrons?

Question 2 Which subatomic particle is not present in an ordinary hydrogen atom?

Question 3 What is a neutron?

Question 4 What is the charge and mass of an electron?

Question 5 State the location of neutrons in an atom?

Discovery of neutron

After the discovery of electrons and protons,it was noticed that all mass of an atom cannot be accounted for on the basis of only protons and electrons.Then the neutrons were discovered.

Chadwick in 1932 discovered another subatomic particle called neutron.
Neutron is present inside the nucleus.
Hydrogen atom does not contain any nucleus.

Characteristics of neutron
1)The mass of neutron is equal to mass of proton.The relative mass of neutron is 1 u and absolute mass is 1.6749 x 10-27 kg.

2)Neutron has no charge.