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An element 'X' has mass number 35 and the number of neutrons, is 18.Identify the group number and period of 'X'. |
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Answer» Atomic number of X = Mass number of X – No. of neutrons Atomic number of X = 35 - 18 = 17 Electronic configuration = 2, 8, 7 Group number = 17 Period Number = 3 |
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