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1.1 KiB
1.1 KiB
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
- 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 (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
| 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.