Ionic and Covalent Compounds

Each atom needs a outer shell to reach their lowest energy. To do this they react with other atoms forming bonds involving electrons.

Ionic compounds are made by combining metals and non-metals. The Metals an electron making them . The non-metal an electron making them .

Covalent compounds are made by combining non-metals. The atoms share electrons.

Arrange the following compounds into the relevant column:
H₂O, NaCl, CuCl, CO₂, CO, NH₃, PbO, CH₄, SiO, FeCl, MgSO₄

Ionic	Covalent

The differences in their properties are a result of different strength of their (forces between the particles).

Property	Ionic	Covalent
Melting Point Boiling Point	Very High	Very Low
Solubility in water	Usually soluble	Usually insoluble
Action on grease	Do not mix	Dissolves grease
Conductivity of electricity	Conduct when dissolved in water	Do not conduct

Use the table to explain why:

1. Ionic compounds are used for furnace linings?  
   
   
2. Simple covalent compounds are good solvents for cleaning circuit boards?  
   
   
3. Simple covalent compounds are usually gasses or liquids at room temperature?  
   
   
4. Ionic compounds are always solid at room temperature?