Define atomic mass number.

The English letter used to represent atomic mass number is

If ‘Z’ is number of protons in the nucleus, ‘N’ is the number of neutrons in the same nucleus than atomic mass number A=

Define atomic number.

Define atomic radius.

How are number of fundamental particles calculated from atomic and mass numbers ?

The ratio between the neutrons present in carbon atom and silicon atoms with mass numbers 12 and 28 is

The ratio between the neutrons present in carbon atom and silicon atoms with mass number 12 and 28 is

A neutron moving with a certain kinetic energy collidies head on with an atom of mass number A. The fractional kinetic energy retained by it is