Chemestry - structure of atom

Atoms are really god damn small. Thats what she said.

• their are protons neutrons an electrons in atom
• protons are positive
• electrons are negative
• neutrons are neutral
• the atomic number is the number of protons in atom.
• mass number is number of protons and neutrons.

Stable atoms

• stable atoms have a full outer shell

• unstable atoms are atoms that have don't have a full outer shell