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Listed under:  Science  >  Matter  >  Chemical compounds  >  Bases (Alkalis)  >  Ammonia

Ammonia molecule

This is a colour image of a model of a molecule of ammonia, NH₃. In this model, atoms are represented by coloured spheres held together by grey rods, representing covalent bonds. The ammonia molecule consists of one nitrogen atom (the blue sphere) and three hydrogen atoms (the grey-white spheres).

Interactive resource

Mine rescue

Rescue three miners trapped by fire. Select and test gases to find out which gas will put out the fire and which gas the miners can breathe.