Define atomic weight and atomic number of an element

Define atomic number of an element?

If W is atomic weight and N is the atomic number of an element, then

Compared with an atom of atomic weight 12 and atomic number 6 , the atom of atomic weight 13 and atomic number 6 .

Deduce the relation between equivalent weight and atomic weight of an element.

Define atomic mass of an element.

Define atomic number and mass number of an atom.

Define the term - 'atomic number of an atom. If an atom 'A' has an atomic number of - eleven, state the number of protons & electrons it contains.

Define the atomicity of a molecule of an element?

Define atomic number of an element. How is it related to the mass number ?