The atomic number of an element is 17 what is its valency whether it is a metal or nonmetal
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its electronic configuration = 2.8.7
therefore it requires one more electron to become stable
non metal, because it will show the tendency to gain electrons. It belongs to 3rd period and it has a smaller size as compare to other members of the serial because size of atom decreases in a period due to increase in the nuclear charge
therefore it requires one more electron to become stable
non metal, because it will show the tendency to gain electrons. It belongs to 3rd period and it has a smaller size as compare to other members of the serial because size of atom decreases in a period due to increase in the nuclear charge
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