Home
Class 11
CHEMISTRY
Increase in atomic size down the group i...

Increase in atomic size down the group is due to increase in

A

the number of electrons

B

the number of protons and neturons

C

the number of neutrons

D

the number of protons, neutrons, and electrons

Text Solution

Verified by Experts

The correct Answer is:
A
On moving down the group, the atomic size increases due to an increase in the number of good shielding electrons.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY IN ELEMENTS

    R SHARMA|Exercise Level -IV|1 Videos

  • CHEMICAL BONDING

    R SHARMA|Exercise Archives|73 Videos

  • EQUILIBRIUM

    R SHARMA|Exercise ARCHIVES|69 Videos

Similar Questions

Explore conceptually related problems

Usually the atomic and ionic radii should increase with increasing atomic number down the group. But there is not much increase at Ga and TI in group-13 and is due to

The resistance of a metal increases with the increase of temperature due to increase in the

Knowledge Check

  • Generally the atomic and ionic radii increase with increase in atomic number down the group. But the atomic size of aluminium and gallium is almost the same. This is because

    A
    The nuclear charge of Ga is higher than that of Al
    B
    Gallium contains intervening d-electrons which do not not screen the valence electrons effectively
    C
    the ionization energies of Ga and Al are comparable
    D
    All of the above.

  • convalent and ionic (in a particular state )radii increase in size down that group. Only a small increase in covalent radius is observed as one moves from

    A
    `N` to`P`
    B
    `P` to`As`
    C
    `As` to`Sb`
    D
    `Sb` to`Bi`

  • Ionization enthalpy decreases down the group due to gradual increases in atomic size .However the deviation is observed as we move from

    A
    `Sb` to`Bi`
    B
    `As` to`Sb`
    C
    `P` to`As`
    D
    `N` to`P`

    • Similar Questions

    Explore conceptually related problems

    The resistance of a metal increases with the increase of temperature due to increase in the

    Assertion :- Metallic character increases on going down the group Reason :- I.E. decreases on going down the group

    Assertion :Solubility of noble gases in water decreases with increases in atomic size Reason :Solubility of noble gases in water is due to instantaneous dipole induced dipole interaction

    Metallic Character The ability of an atom to donate electrons and form positive ion (cation) is known as electropositivity or metallic character. Down the group, metallic character increases due to increase in atomic size and across the period, from left to right electropositivity decreases due to decrease in atomic size. Non-Metallic Character The ability of an atom to accept electrons to form a negative ion (anion) is called non-metallic character or electronegativity. The elements having high electro-negativity have a higher tendency to gain electrons and form anion.Down the group, electronegativity decreases due to increase in atomic size andacross the period, from left to right electronegativity increases due to decreasein atomic size Identify the reason for the gradual change in electronegativity in halogensdown the group.

    Metallic Character The ability of an atom to donate electrons and form positive ion (cation) is known as electropositivity or metallic character. Down the group, metallic character increases due to increase in atomic size and across the period, from left to right electropositivity decreases due to decrease in atomic size. Non-Metallic Character The ability of an atom to accept electrons to form a negative ion (anion) is called non-metallic character or electronegativity. The elements having high electro-negativity have a higher tendency to gain electrons and form anion. Down the group, electronegativity decreases due to increase in atomic size and across the period, from left to right electronegativity increases due to decrease in atomic size Which of the following reason correctly justifies that “Fluorine (72pm) has smaller atomic radius than Lithium (152pm)”?

    Home
    Profile