NCERT
9. The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion? (a) 13 (b) 10 (c) 14 (d) 16 10. Identify the Mg2+ ion from the Fig.4.1 where, n and p represent the number of neutrons and protons respectively (a) (b) (c) (d) 11. In a sample of ethyl ...
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