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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the group no of element is 17 or halogen group VII A
the period of x is 3 because it has three shells
the period of x is 3 because it has three shells
dm7:
it should be Group 17 Period 3
the electronic configuration would be 2 8 8 and hence it is a noble gas hence in group 0 or VIII
oh sorry you are right
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Answer:
We know :
Atomic number = Mass number - No. of neutrons.
Atomic number = 35 - 18
= > 17
Electronic configuration :
2 , 8 , 7
Group no. = 17
Period no. = 3
Name of element is Chlorine ( Cl ) .
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