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elena-14-01-66 [18.8K]
3 years ago
9

Which elements have electron configurations that end in ns2np5?

Chemistry
2 answers:
Dahasolnce [82]3 years ago
5 0

Explanation:

The given configuration is ns^{2}np^{5} and this shows that there are seven valence electrons present in the outermost shell. Therefore, it is a general configuration of group 17 which is also known as halogen group.

Elements of group 17 are fluorine, chlorine, bromine, iodine and astatine.

For example, fluorine is a group 17 element that has electronic configuration 1s^{2}2s^{2}2p^{5}.

Value of n will start from 2 and increases on moving down the group.

Hence, we can conclude that halogens are the elements that have electron configurations that end in ns^{2}np^{5}.

Arada [10]3 years ago
4 0
Last level of atoms of these elements has 2+5= 7 electrons. These elements are located in the 17th group of the Periodic Table, and they are called halogens.
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