Write short notes on Inert elements

1.	Write short notes on Inert elements
Answer» i. Elements present in group 18 on the extreme right of the modern periodic table are called inert elements or noble gases. They have completed outermost shell. ii. Their outermost shell contains 8 electrons except Helium which contains 2 electrons. iii. These elements do not gain or lose or share electrons with other atoms and hence, do not undergo any chemical reactions under ordinary conditions. iv. Their valency is zero. v. Hence, they are also called zero group elements. vi. These elements are included in ‘p’- block of modern periodic table. vii. Inert elements include Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe) and Radon (Rn). viii. All these elements are gases.

Answer»

i. Elements present in group 18 on the extreme right of the modern periodic table are called inert elements or noble gases. They have completed outermost shell.

ii. Their outermost shell contains 8 electrons except Helium which contains 2 electrons.

iii. These elements do not gain or lose or share electrons with other atoms and hence, do not undergo any chemical reactions under ordinary conditions.

iv. Their valency is zero.

v. Hence, they are also called zero group elements.

vi. These elements are included in ‘p’- block of modern periodic table.

vii. Inert elements include Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe) and Radon (Rn).

viii. All these elements are gases.

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