1. IC2.1.3 Ammonia 1 © Oxford University Press 2011 Ammonia 1

2. IC2.1.3 Ammonia 1 © Oxford University Press 2011 Ammonia is a raw material for making fertilizers and explosives. Ammonia solution is a household cleaner.

3. IC2.1.3 Ammonia 1 © Oxford University Press 2011 Fish produce ammonia as a waste product. They excrete the ammonia into the water from their gills.

4. IC2.1.3 Ammonia 1 © Oxford University Press 2011  Ammonia is a compound.  The molecular formula of ammonia is NH 3.  There are three atoms of hydrogen for every one atom of nitrogen.

5. IC2.1.3 Ammonia 1 © Oxford University Press 2011 Ammonia gas exists as molecules. The atoms are held together by covalent bonds. Ammonia is a compound. The molecular formula of ammonia is NH 3. There are three atoms of hydrogen for every one atom of nitrogen.

6. IC2.1.3 Ammonia 1 © Oxford University Press 2011  When nitrogen and hydrogen react to form ammonia, the two types of atom join together by sharing pairs of electrons.  Each shared pair of electrons is one covalent bond.  By sharing electrons, both the nitrogen and hydrogen atoms achieve stable electronic structures.