Why cations having +3 or more charge are rare?
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Because cations can only donate electrons. And we know that only electrons upto 3 can be donated or accepted as if more than 3 electrons are released than, there will be sharing of electrons ( like carbons). Hence, there will be no concept of ions as ions are formed when electrons are totally given or accepted not when shared.
Cations have +3 charge because they donate electrons ( electron donors ), So a positive charge is formed with the number of electrons donated.
_________
Because cations can only donate electrons. And we know that only electrons upto 3 can be donated or accepted as if more than 3 electrons are released than, there will be sharing of electrons ( like carbons). Hence, there will be no concept of ions as ions are formed when electrons are totally given or accepted not when shared.
Cations have +3 charge because they donate electrons ( electron donors ), So a positive charge is formed with the number of electrons donated.
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