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Noble gases have larger atomic size than...

Noble gases have larger atomic size than the preceeding halogens because

A

They are gases

B

They have low reactivity

C

Vanderwaals radius is considered in them

D

They are insoluble in water

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • The noble gases havier than air are

    A
    Ar
    B
    He
    C
    Ne
    D
    Kr

  • It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. Atomic radii of the noble gases are larger than the precedent elements of the same periods because

    A
    Atomic radius of a noble gas is expressed as vander Waal's radius
    B
    Valence shell electron are completely filled so there is interelectronic repulsions
    C
    Both (a) and (b)
    D
    None

  • Interhalogen compounds are more reactive than the individual halogen because

    A
    Two halogens present in place of one
    B
    They are more ionic
    C
    Their bond polarity is more than that of the halogen molecule
    D
    They carry more energy

    • Similar Questions

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    Why do noble gases have comparatively large atomic sizes ?

    Why Noble gases have zero electron gain enthalpy?

    (A) Noble gases have lower melting points and boiling points (R) Noble gases posses weak dispersion forces.

    (A) : In the separation of inert gases, by Dewar's method He gas does not absorbed on activated charcoal (R ) : Among noble gases helium has less atomic size The correct answer is

    (A) Noble gases have very high ionization enthalpies in periodic table (R) All noble gases have stable octet configuration in their valence shell

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