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The mass number defines the number of protons and neutrons in an atom. The atomic number shows the number of protons in an atom (nucleus). Because there is the same number of protons as e...

A reducing agent is oxidized. This means that it donates electrons to another substance, thus reducing it. Fe2+ to Fe3+ represents oxidation. Fe2+ could be a reducing agent.

Acidified Potassium Manganate(VII).  Propanoic acid (which is a carboxylic acid) can be made by oxidising propanol (which is an alcohol). In this case, oxidation involves adding an oxygen atom and removin...

All group 1 elements have 1 electron in their outer shell, making this the electron that is involved in reactions. As you move down a group in the periodic table the number of shells increases, which mean...