an element x has mass no 35 and the no of nuutron is 18 identify tje group and no and period of x
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Answer :-Atomic number of X = Mass number of X – No of neutrons
= 35 – 18 = 17
Therefore Electronic configuration of X = 2,8.7
●Group number =17
●Period number = 3
Valency = 8-7 = 1
= 35 – 18 = 17
Therefore Electronic configuration of X = 2,8.7
●Group number =17
●Period number = 3
Valency = 8-7 = 1
ragavan007:
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Well, if we look at the periodic table, the element with the mass closest to 35 is chlorine. It has a mass of 35 and atomic number 17. If it has 18 neutrons, it will have a mass of 35.
The answer is Chlorine-18
and chlorine falls under period 3 and group 17
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