Among the elements with atomic number 9, 12 and 36, identify the eleme

1.	Among the elements with atomic number 9, 12 and 36, identify the element which is (a) highly electronegative, (b) an inert gas in nature, (c) highly electropositive in nature. Give reasons for your answer.
Answer» The electronic configurations of the elements are: Z (9): 1s² 2s² 2p⁵ Z (12): 1s² 2s² 2p⁶ 3s² Z (36): 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ (a) The element with Z= 9 (fluorine) is highly electronegative because it requires only one electron to have the configuration of nearest noble gas element and has also very small size. It is, in fact the most electronegative 4 (0) in the periodic table. (b) The element with Z = 36 (Krypton) is an inert gas element as it has ns² p⁶ electronic configuration. (c) The element with Z = 12 (Magnesium) is highly electropositive in nature, since by losing two valence electrons, it will have the configuration of the noble gas neon.

Among the elements with atomic number 9, 12 and 36, identify the element which is (a) highly electronegative, (b) an inert gas in nature, (c) highly electropositive in nature. Give reasons for your answer.

Answer»

The electronic configurations of the elements are:

Z (9): 1s² 2s² 2p⁵

Z (12): 1s² 2s² 2p⁶ 3s²

Z (36): 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶

(a) The element with Z= 9 (fluorine) is highly electronegative because it requires only one electron to have the configuration of nearest noble gas element and has also very small size. It is, in fact the most electronegative 4 (0) in the periodic table.

(b) The element with Z = 36 (Krypton) is an inert gas element as it has ns² p⁶ electronic configuration.

(c) The element with Z = 12 (Magnesium) is highly electropositive in nature, since by losing two valence electrons, it will have the configuration of the noble gas neon.

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