help me solve this que
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hello mate the answers is
a) belongs to 17th group
b) belongs to 3rd peroid
c) Formula is Cl
a) belongs to 17th group
b) belongs to 3rd peroid
c) Formula is Cl
Answered by
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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
therefore, chlorine is the element X
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