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Why noble gases have positive electron gain enthalpy?

Important Questions on p-Block Elements

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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
Inert gases have positive electron gain enthalpy. Its correct order is
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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
Which one has the highest boiling point?
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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
The element that even can diffuse through silica glass is
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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements

Give a reason for the following:

Inert gases do not form ions.

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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
What is the difference between α— particle and He atom?
HARD
Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements

The following table represents the elements and the atomic number. With reference to this, answer the following using only the alphabets given in the table.

Element Atomic number
P 13
Q 7
R 10

Which element has an electron affinity zero?

HARD
Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
Why are boiling points of noble gases very low? How the boiling points vary on going down the group (gr-18) ?
 
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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
The noble gas that does not occur in the atmosphere is;
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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
Ionization energy of noble gases is very high. Why?
MEDIUM
Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
Why the noble gases have very low boiling points?
MEDIUM
Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
Why are the elements of Group 18 known as noble gases?
MEDIUM
Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements

Account for the following:

Boiling point of noble gases increases from He to Rn.

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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
Which of the following noble gases is abundant in air?
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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Amongst He, Ne, Ar and Kr; 1 g of activated charcoal adsorbs more of Kr.

Reason R: The critical volume Vc (cm3 mol–1) and critical pressure Pc (atm) is highest for Krypton but the compressibility factor at critical point Zc is lowest for Krypton.

In the light of the above statements, choose the correct answer from the options given below.

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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
Name the noble gas having ns2np6 electronic configuration but does not have d-orbitals in its valence shell.
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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements

Answer the following :

Noble gases have very low boiling points. Why?

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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements

Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.

HARD
Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
Assertion A The boiling points of noble gases increases from He to Xe.

Reason (R) The interatomic van der Waals' attractive forces increases from He to Xe.

The correct answer is
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Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
The electronic configuration of elements A, B & C are He 2s1, Ne 3s1 & Ar 4s1 respectively. Which one of the following order is correct for the first ionization potentials (in KJmol–1) of A, B & C?
MEDIUM
Chemistry>Inorganic Chemistry>p-Block Elements>Atomic and Physical Properties of Group 18 Elements
Assertion (A) : Noble gases have very low boiling points.

Reason (R) : All noble gases have general electronic configuration of ns2 np6 (except He)