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By definition, all transition metal ions have d orbitals. These are normally degenerate, lying at the same energy level as there is nothing to break the symmetry.

However, in the presence...

This is quite a complicated sounding question but it is actually quite simple if you break it down! Start by writing a balanced equation for the reaction:

3H₂ (g) + ...

Sometimes two molecules can exist as non-superimposable mirror-images. That is to say, the mirror image of a molecule cannot be exactly placed on top of the original molecule.

A good exam...

Diamond has a giant structure of carbon atoms held together by strong covalent bonds:  - Diamond is made up of many strong covalent bonds, so a lot of energy is needed to overcome them, so diamond has a h...

Background Information

This is a neutralisation reaction between an acid (sulfuric acid) and a base (copper carbonate). When a carbonate reacts with an acid, the products...