Question

Inert gases are placed in a separate group in the modern periodic table ?
(a) State the group number
(b) How many valence electron do most of these gases have?
(c) Why are they unreactive ?
(d) Name any two inert gases ?

Answer 1

Here Are Your answers,

(a) Inert gases are placed in 18 group .

(b) Inert gases haveno elevtron in their outermost shell ..i.e 0

(c) As they do not have and electron in their outermost shell thats why they are not reactives ...

(d) Helium, Neon, Argon are some Inert Gases ....

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Answer 2

a. the group no. is 18
b. they dont have any valenced electron as their valenced shells are completely filled with electrons.
c. their valenced shells are completely filled with electrons so the effective nuclear charge increases and the atomic radius decreases. thats why they are unreactive.
d. any two inert gases are helium, neon, argon etc. (can write any two)