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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Answered by
6
heya folk !!!!
Mass number = Atomic number + no. of neutrons
Atomic number = Mass number - no. of neutrons
= 35-18 = 17
Group no- 17
period -3
Mass number = Atomic number + no. of neutrons
Atomic number = Mass number - no. of neutrons
= 35-18 = 17
Group no- 17
period -3
Answered by
5
Since the mass no. is 18 ,then it has 17 proton or electron this reveals the element is chlorine and it has 3 shells so it's period is 3rd and it belong to halogen group i.e. 17th group.
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