# Unit 1: Chemistry

- Matter - has mass, takes up space.
    - fundamental unit -> ATOMS

## Atoms
- Atoms are the smallest unit of an element that still retains its properties
- Atoms are made of subatomic particles

|Name|Symbol|Relative mass|Location|Relative Change|
|:---|:-----|:------------|:-------|:--------------|
|

## IUPAC
|Letter|Definition|
|:-----|:---------|
|I|International|
|U|Union|
|P|Pure and|
|A|Applied|
|C|Chemistry|

- Involved in studying, varifying information (eg the periodic table -> Describes the elements -> pure susbtances made of only one kind of atom),and publishing.