The Structure of Matter

What is the only difference between x-ray and gamma rays?

What letter symbolizes the atomic number of an element?

What is the letter of the electron shell closest to the nucleus?

Name three fundamental particle of the atom?

What part of the nucleus of an atom has a positive charge and mass?

A neutral atom has the same number of _____ and _____.

Who developed the periodic table?

The Greek word "atomos" means what?

An atom that loses or gains one or more electrons is a(n) _____.

The least penetrating form of ionizing radiation is a(n) _____.