0an element 'X' has mass number 35 and the number of neutron , is 18 identify the group number and period of 'X'
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atomic no= 35 - 18 = 17
so electronic configuration is 2,8,7
it has three shells so it is in 3rd period
so electronic configuration is 2,8,7
it has three shells so it is in 3rd period
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p + n= mass
here p is no. of protons or atomic no.
n is. for no. of neutron,so,
p+18=35
that is, p=17
so atomic no. is 17 hence the group will also be 17 and period will equal to no. of shells that is 3 beacuse its electronic configuration is 2,8,7
pls mark me as brainliest.
here p is no. of protons or atomic no.
n is. for no. of neutron,so,
p+18=35
that is, p=17
so atomic no. is 17 hence the group will also be 17 and period will equal to no. of shells that is 3 beacuse its electronic configuration is 2,8,7
pls mark me as brainliest.
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