An element x has mass number 35 and number if neutrons is 18 identify the group number and the period of x
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mass number =. protons+neutrons
therefore here
no. of protons = 35-18= 17
this implies that the element is chlorine which belongs to group 17 and period - 3
therefore here
no. of protons = 35-18= 17
this implies that the element is chlorine which belongs to group 17 and period - 3
Answered by
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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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