Atoms
- Have a nucleus which is positively charged, and electrons which are negatively charged.
- Atoms can form bonds to make molecules or compounds, sometimes an atom loses or gains one or more electron and this gives it a charge (positive if it loses an electron, negative if it gains)
Charged atoms are known as ions, if a positive ion meets a negative ion they'll attract and from an ionic bond.
Covalent bonds are when non-metal atoms combine by sharing electrons.
Formulas to remember
1) Carbon dioxide 2) Hydrogen
3) Water 4) Hydrochloric acid
5) Calcium chloride 6) Carbon Monoxide
7) Magnesium chloride 8) Calcium Carbonate
9) Sulfuric acid 10) Magnesium sulfate
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