Only the counting numbers can exist as atomic numbers. Fractions and decimals cannot be an atomic number.
atomic number atomic weight
Mass number is the sum of neutrons and protons. It is equals to total of their weights. As an example hidrogen-2 (deuterium) has a mass number of 2.
The weight of a football is a non-example of atomic mass. Atomic mass refers to the average mass of an atom of a chemical element, while the weight of a football is a measure of the force of gravity acting on the football due to its mass.
Atomic number= number of protons. Hydrogen atomic number=1
Atomic number= number of protons. Hydrogen atomic number=1
Atomic number= number of protons. Hydrogen atomic number=1
Bromine is a non metal. atomic number of it is 35.
Silicon is a non meta element. Atomic number of it is 19.
Radium is a non meta element. Atomic number of it is 88.
Fluorine is a non meta element. Atomic number of it is 9.
Silicon is a non meta element. Atomic number of it is 14.
Tungsten is a non meta element. Atomic number of it is 74.