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Introduction to Noble Gases

The inert gas...

Question

The inert gas present in the second long period is:

A

K r

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B

X e

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C

A r

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D

R n

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Solution

The correct option is C $X e$
Periods $4$ and $5$ are called long periods as they contain $18$ elements each.
$4$ th period is called the first long period and the inert gas in this period is $K r$ .
$5$ th period is the second long period where $X e$ is the inert gas element.

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Similar questions

Q. The inert gas present in the second long period is Xe.

Q. Which of the following is/are true about - He, Ne, Ar, Kr, Xe, Rn etc. ?

Q. Read below given tabular form and answer the questions.

Element	Electronic configuration	Element	Electronic configuration
He	$1 s^{2}$	Kr	$4 s^{2} 4 p^{6}$
Ne	$2 s^{2} 2 p^{6}$	Xe	$5 s^{2} 5 p^{6}$
Ar	$3 s^{2} 3 p^{6}$	Rn	$6 s^{2} 6 p^{6}$

Write the names of 'noble gas' elements.

Q. Read below given tabular form and answer the questions.

Element	Electronic configuration	Element	Electronic configuration
He	$1 s^{2}$	Kr	$4 s^{2} 4 p^{6}$
Ne	$2 s^{2} 2 p^{6}$	Xe	$5 s^{2} 5 p^{6}$
Ar	$3 s^{2} 3 p^{6}$	Rn	$6 s^{2} 6 p^{6}$

5^{t h}

period element?

Q. Read below given tabular form and answer the questions.

Element	Electronic configuration	Element	Electronic configuration
$H e$	$1 s^{2}$	$K r$	$4 s^{2} 4 p^{6}$
$N e$	$2 s^{2} 2 p^{6}$	$X e$	$5 s^{2} 5 p^{6}$
$A r$	$3 s^{2} 3 p^{6}$	$R n$	$6 s^{2} 6 p^{6}$

Why the above elements are inactive in chemical reactions?

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