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[Chem] 請問..

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請問..

why 3 is correct..
the ans is D
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nuclear charge係nucleus入面ge charge
咁protons唔會走,所以無變
走ge只係e-

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3: of course the nuclear charge is the same...
picture that only 2 electrons are added to X
but no. of protons remains UNCHANGED (you learn physics---you know what is proton?)
so the nuclear charge  remains unchanged

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ok, but what is the term to describe the charge of the ion

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it will be ok to use the term charge of ion...lol
the examiner will understand what you are talking about
or you can specify "the charge of the CATION is +1/+2/+3
charge of ANION is -1/-2/-3

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