an element x has mass number 35 protons the number of neutron is 18 identify group number and period x
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as mass is 35 thus it contains 17 proton and 18 neutrons...
therefore it's atomic no. is 17.
It's elec. configuration is 2-8-7
thus period-3
group-17
therefore it's atomic no. is 17.
It's elec. configuration is 2-8-7
thus period-3
group-17
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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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