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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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For example an ionic bonding scenario might play out between a group one metal and a group seven halogen. While group one metals have one electron hindering their stability, group seven halogens need that one electron that could make them achieve this stability. It is this that causes them to come together in a way where the electron is transferred completely from the valence shell of the group 1 atom and accepted into the valence shell of the group 7 halogen.

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