predict the group and period of the following
HE ( atomic number - 2 )
Cl ( atomic number - 17 )
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hey there buddy
Explanation:
at no.is 2 therefore the element is helium.
helium lies in 18th group and it's in the 1st period
at no. is 17 therefore the element is chlorine.
chlorine lies in 17 group and 2 period.
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