1]All the following properties decreases down a group in the periodic table EXCEPT
electron affinity
atomic radius
ionization energy
electronegativity.
2]Calcium and magnesium belong to the same group in the periodic table because both
are metals
form cations
form colourless salts
have the same number of valence electron
3]If the ground state electronic configuration of an element Q is 1s2 2s2 2p6 3s2, what would be the atomic number of its cation Q2+?
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Asked by ayomide on 8th July, 2020
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