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Targets for Ionic and Covalent bonding and Gases in the atmosphere test -…
Targets for Ionic and Covalent bonding and Gases in the atmosphere test
Ionic bonds- held together by strong electrostatic forces of attraction between oppositely charged ions
Strong ionic bonds between metals and non metals
Ionic bonding diagram:
Can conduct electricity- has free delocalised ions
takes a lot of energy to break
Simple covalent bonds- held together between strong electrostatic forces of attraction between 2 positive charged Nuclei and a negative charged pair of electrons
Simple covalent substances- Low melting/ boiling points : :
Covalent bonding diagram
Giant covalent substances: Diamond, Graphite
Diamond
High Melting Point and Boiling Point
Made of carbon atoms
Does not conduct electricity
Not soluble in Water
Rigid Lattice structure
Hard
Graphite
Soft, slippery
soluble in water
conducts electricity- has free moving delocalised electrons
Made of carbon atoms
High melting and boiling point
Iron wool experiment: iron is used in excess to make sure all the oxygen has reacted
observations: water level rises, wool changes to an orangy rust
percentage of oxygen decreases when less iron wool is used
percentage of oxygen stays the same when more iron wool is used
Magnesium oxide- MgO
Ionic compound
Held together by strong electrostatic forces of attraction between oppositely charged ions
Magnesium+oxygen -> Magnesium oxide
Oxygen
o2
Magnesium
Mg
Can conduct electricity had free delocalised ions
