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Yes, In case of magnesium Mg+2.... As we know that no. Of protons is equal to no. Of electrons, Mg have 10 electrons ( loss of electrons) and 12 protons.. Mass Mg+2 is mass is taken as 25, mass no. = no.of protons + neutrons... No.of neutrons = 25-12 = 13.. Therefore, Mg exhibits it with 12 protons and 13 neutrons...
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I think the answer will be NO, Because if the protons are 12 then you are talking about MAGNESIUM which has 12 neutrons.
And this can possible to have neutrons greater than protons only in heavy metals.
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