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From organic chemistry to electrolysis, chemistry can become quite
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, The periodic table
Give the electronic configurations of sodium, chlorine, oxygen, and magnesium. - Na =
2.8.1
- Cl = 2.8.7
- O = 2.6
- Mg = 2.8.2
What is the period number of the periodic table?
- tells you the number of shells of electrons
- e.g. Ca 2.8.8.2 has four shells of electrons and is therefore in period 4
What is the group number of the periodic table?
- tells you the number of electrons in the outer shell
- e.g. F has 7 electrons in its outer shell and is therefore in group 7
Why do elements in the same group have similar chemical properties? - same number of
electrons in outer shell
Why are Noble gases (group 0) unreactive?
- they have a full outer shell of electrons
Describe the layout of the periodic table
- hydrogen by itself
- metals found left of stepped line
- non-metals found right of stepped line
Define malleable
- may be hammered into shape
Define ductile
- may be drawn into a wire
Describe the properties of metals
- good conductors of heat and electricity
- shiny
- malleable
- sonorous
- malleable
- ductile
- form positive ions in ionic compounds
- partake in ionic bonding
- form basic oxides
- solids at room temperature (except mercury)
Describe the properties of non-metals
- poor conductors of heat and electricity
- brittle
- form negative ions in ionic compounds
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