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Van der waal's radius is measured for...

Van der waal's radius is measured for

A

Molecular substances in gaseous state only

B

Molecular substances in solid state only

C

Molecular substances in liquid state only

D

Molecular substances in any state

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The correct Answer is:
B
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Van der Waal's radius is used for

Atomic radius is measured by

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The correct order of Vander Waals radius of F, Cl and Br is :

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. The size of iso electronic species -F^(-) , Na^(+) and Mg^(2+) is effected by

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. The correct order of radii is

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

AAKASH SERIES-PERIODIC CLASSIFICATION-OBJECTIVE EXERCISE - 1 (ATOMIC AND IONIC RADIUS)
  1. Atomic radius depends upon (i) Number of bonds formed by the atom ...

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  2. Covalent bond length of chlorine molecule is 1.98Å. Then covalent radi...

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  3. Van der waal's radius is measured for

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  4. If the atomic radius of non-metal bromine is 1.14 Å, its covalent radi...

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  5. The covalent and van der Waals radii of chlorine respectively are

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  6. In the isoelectronic species the ionic radii (A^@) of N^(3-) , O^(2-) ...

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  7. Correct statement among the following is

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  8. Very slight decrease in atomic radius occurs in a transition series wh...

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  9. Separation of Lanthanides from their mixture is not easy because of

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  10. If the radius of Fe^(+ +) is 0.76A^@, the radius of Fe^(+ + +) may be

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  11. Among elements with the following electronic configurations, the one w...

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  12. Largest ion among the following is

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  13. Which of the following has the largest atomic radius ?

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  14. Which of the following order is correct for the size of Fe^(3+) , Fe a...

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  15. Similarity in the radius of Zr and Hf is explained on the basis of

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  16. Metallic radius of Ca is 200pm. Covalent radius of Ca is

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  17. Which one is the correct order of the size of the iodine species?

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  18. The correct sequence which shows decreasing order of the ionic radii o...

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  19. The Lanthanide contraction relates to (AFMC)

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  20. In a group from top to bottom effective nuclear charge

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