C4 Chemical Patterns
- Created by: scarpio22
- Created on: 24-10-15 16:47
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- C4 - Chemical Patterns
- Group 1
- Reactivity
- As electrons on the outer shell get much further away from the nucleus as you go down group 1, electrostatic bond gets weaker
- This mean that reactivity increases as you go down the group
- As electrons on the outer shell get much further away from the nucleus as you go down group 1, electrostatic bond gets weaker
- Reactions
- Chlorine
- Colourless, crystalline salt
- Formula = MCl, where M is group 1 metal
- Oxygen
- Tarnishes in moist air
- Water
- Li - fizzing
- Na - violent fizzing
- K - flame
- Chlorine
- Reactivity
- Ionic Bonding
- Periodic Table
- Spectroscopy
- Some elements produce different colour flames when burnt
- When refracted, to get spectra, each element has it's unique spectra
- Some elements produce different colour flames when burnt
- Interpreting
- Two numbers next to element's symbol. RAM (Relative Atomic Mass) and Proton Number
- Larger Number is RAM
- Smaller number is Proton Number
- There are the same number of electrons as the proton number, creating an overall neutral atom.
- If you go across the periodic table, the row is called a period
- If you go up or down the table, the column is called a group
- Atomic Structure
- Electrons : Negative charge, and have a mass of 1/2000
- Protons: Positive charge, has a mass of 1
- Neutrons: No charge (neutral), has a mass of 1
- Two numbers next to element's symbol. RAM (Relative Atomic Mass) and Proton Number
- Development
- Döbereiner
- 'Triads' - Patterns of three
- If you take average of 3 similar elements, you get the same as the 'middle' element.
- Doesn't work for ALL elements
- If you take average of 3 similar elements, you get the same as the 'middle' element.
- 'Triads' - Patterns of three
- Newlands
- 'Octaves' - every 8th element similar
- Arranged elements by RAM
- Didn't work for ALL elements
- New elements being discovered
- Mendeleev
- Also arranged elements by RAM
- Gaps in table for undiscovered elements
- New elements properties predicted.
- Döbereiner
- Electronic Configuration
- First shell holds 2 electrons
- Other shells hold 8 electrons
- Fill shells from inside
- Spectroscopy
- Group 7
- Reactivity
- Electrons on the outer shell also get further away from nucleus, meaning a weaker electrostatic bond
- However, reactivity decreases as it is harder to gain electrons when the outer shell is further from the nucleus.
- Electrons on the outer shell also get further away from nucleus, meaning a weaker electrostatic bond
- Properties
- All group 7 elements are diatomic
- Fluorine is a pale yellow gas at room temp.
- Chlorine is a green gas at room temp.
- Bromine is a red-brown liquid at room temp.
- Iodine is a grey solid at room temp.
- Iodine forms a purple gas
- Bromine forms an orange gas.
- Iodine is a grey solid at room temp.
- Bromine is a red-brown liquid at room temp.
- Chlorine is a green gas at room temp.
- Displacement
- Reactivity
- Group 1
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