structer of an atom

structer of an atom

1. The atomic number of an atom is the number of protons in the nucleus of that atom. Each element has its own atomic number. The mass number of an atom = number of protons + number of neutrons.

2. A subatomic particle is a particle found inside an atom.

3. all materials are made of millions of tiny particles called atoms.

4. The atom is made up of smaller particles called sub-atomic particles. These are: Protons (found in nucleus) – positive charge Neutrons (found in nucleus) – neutral charge Electrons. (wiz around the nucleus in “shells” or the “electron cloud”) – negative charge