Chemistry C4
- Created by: 12asellars
- Created on: 30-03-17 09:02
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- Chemistry C4
- Line Spectrums
- Lithium, Li, Red Flame
- Sodium, Na, Yellow Flame
- Potassium, K, Lilac Flame
- Different Elements have different line spectrums
- The Periodic Table
- Dobereiner organised it into triads
- Mendeleev left gaps for new elements to be found
- Electron Shells
- 2 electrons in shell 1. 8 in each shell after that.
- EG: Chlorine = 2,8,7
- Ionic Bonding
- Ions are made when atoms gain or lose electrons
- If it has less than 3 in the outer shell, it loses them
- They become posotive
- If it is nearly a full shell it gains electrons
- It becomes negative
- Alkali Metals (Group 1)
- As you go down they become
- More reactive
- Higher density
- Lower melting point
- Lower boiling point
- When they react with water they form hydrogen gas.
- As you go down they become
- Halogens (Group 7)
- As you go down they become:
- Less reactive
- Higher Melting point
- Higher boiling point
- As you go down they become:
- Line Spectrums
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