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# Unit 1: Chemistry
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- 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.
