Electrons do not orbit around the nucleus of an atom in neat planet orbits but instead move at high speeds in an electron cloud.

Atoms of the same element which have a different number of neutrons are called:

 What is a subatomic particle with a positive charge that is in the nucleus of an atom?

What is the evidence of Chemical change?

Arrange the following sequences according to a correct trend in ionization energy.  Al,S,Cl,P