an element x has mass number 35 and the no of neutrons is 18 indentify the group number and period of x
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the element is chlorine z=n-A
Z=35-18
z=17
so chlorine has atomic number 17
Z=35-18
z=17
so chlorine has atomic number 17
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x- chlorine
group no.17
period.3
group no.17
period.3
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