ALL substances are made up of atoms.
NEUTRONS 0 (except hydrogen)
ELEMENTS are just ONE type of atom.
COMPOUNDS are formed from 2 or more ELEMENT chemically joined.
2 atoms share electrons
atoms turn into ions. Lose or gain electrons
Substance you start with before a reaction
New formed substances
- different elements in a compound
- number of atoms
everything inside it is multiplied by the number outside
- Different type of atom
- Number of each different type of atom
- Covalent bonds
Copper (II) carbonate
Iron (II) carbonate