An ion is an atom or molecule which has either gained an electron or lost one so that it is no longer neutral.
For example the sodium cation, Na+.
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N and P for example. Nitrogen will form a N3- the nitride ion.
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For example the ion (PO4)3-.
A positive ion is an ion with no negative charges.
For example the sodium cation, Na+.
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The thiosulfate ion (S2O3-2) is an example of a polyatomic ion. There are about a hundred or so of these, of which some of the most common are hydroxide (OH-1), nitrate (NO3-1) and carbonate (CO3-2).
N and P for example. Nitrogen will form a N3- the nitride ion.
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Ion of hydrogen.
Matches- potassium nitrate