In group 13, electronegativity first decreases from B to Al and then increase marginally down the group. This is because of :

non- metallic nature of B

No worries! We‘ve got your back. Try BYJU‘S free classes today!

discrepancies in atomic size of element

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

ability of B and Al to form

p π

p π

multiple bonds

No worries! We‘ve got your back. Try BYJU‘S free classes today!

irregular trend in electronegativity throughout the periodic table

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B discrepancies in atomic size of element
Answer:- (B) discrepancies in atomic size of an element.
Reason:-
Electronegativity of an element depends upon
(a) Size of an atom
(b) The magnitude of a nuclear charge
On going from Al to Ga, The electrons start filling into the d-subshells. Since these intervening electrons do not screen the nuclear charge.
Hence, the electrons in Ga experience more force of attraction than in Al causing a decrease in atomic size and increase in electronegativity.
Thus, Electronegativity decreases from B to Al and then increases due to discrepancies of an atomic size of the elements.

Suggest Corrections

Similar questions

Q. Question 48 (b)
(a) Electropositive nature of the element(s) increases down the group and decreases across the period
(b) Electronegativity of the element decreases down the group and increases across the period
(c) Atomic size increases down the group and decreases across a period (left to right)
(d) Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.

Name the most electronegative element.

(a) Electropositive nature of the element(s) increases down the group and decreases across the period.
(b) Electronegativity of the element decreases down the group and increases across the period.
(c) Atomic size increases down the group and decreases across a period (left to right).
(d) Metallic character increases down the group and decreases across a period.

On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.

Name the most electronegative element :

Question 48 (c)
(a) Electropositive nature of the element(s) increases down the group and decreases across the period
(b) Electronegativity of the element decreases down the group and increases across the period
(c) Atomic size increases down the group and decreases across a period (left to right)
(d) Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.

Name the element with smallest atomic size.

Q. Question 48 (a)
(a) Electropositive nature of the element(s) increases down the group and decreases across the period
(b) Electronegativity of the element decreases down the group and increases across the period
(c) Atomic size increases down the group and decreases across a period (left to right)
(d) Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.

Name the most electropositive element among them

Q. Question 48(e)
(a) Electropositive nature of the element(s) increases down the group and decreases across the period
(b) Electronegativity of the element decreases down the group and increases across the period
(c) Atomic size increases down the group and decreases across a period (left to right)
(d) Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.

Name the element which shows maximum valency.

Join BYJU'S Learning Program