Atomic Stucture

Match it! Select the correct answer from the pull down...Good luck!

The atomic number is equal to the number of....

The negatively charged particle of the atom is called the

When atoms of the same element have differing number of neutrons they are called

The sum of the protons and neutrons in the nucleus is called the

The modern atomic model is based on principles of what?

The positively charged particle in the nucleus of an atom is

The center of the atom is called the

Who discovered the Nucleus