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Update Unit 1: Chemistry.md

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Grade 10/Science/SNC2DZ/Unit 1: Chemistry.md
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## Atoms ## Atoms
- Atoms are the smallest unit of an element that still retains its properties - Atoms are the smallest unit of an element that still retains its properties
- Atoms are made of subatomic particles - Atoms are made of subatomic particles
- Relative Charge: compared to something.
- AMU = atomic mass units
- models allow people to make accurate preictions about the behaviour of matter
- atmoic notation $`_{19}K`$
- an isotope is an atom (or atoms) of an element with a unique # of neutrons
|Name|Symbol|Relative mass|Location|Relative Change| |Name |Symbol|Relative mass (amu)|Location|Relative Charge|
|:---|:-----|:------------|:-------|:--------------| |:--------|:-----|:------------------|:-------|:--------------|
| |Protons |$`p^+`$| 1 |nucleus | $`+1`$ |
|Neutrons |$`n^0`$| 1 |nucleus | $`0`$ |
|Electrons|$`e^-`$|$`~\frac{1}{2000}`$|in orbit around nucleus (shell, energy level)|$`-1`$|
## IUPAC ## IUPAC
|Letter|Definition| |Letter|Definition|