Which of the following statements is incorrect?

In any group, the atomic radius increases while going down the group.

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In any period, the atomic radius increases from left to right.

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In any period, the electronegativity of an atom increases from left to right.

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In any group, the metallic character of elements increases while going down the group.

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Solution

The correct option is B In any period, the atomic radius increases from left to right.
Atomic radius increases as we go down a group with the filling of electrons in an additional shell. Across a period, nuclear charge increases by one unit. As a result, the electrons are pulled more tightly leading to shrinking of radius as we move across the period. Hence in any period, the atomic radius decreases from left to right.

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Similar questions

Q. Choose the correct answer:
With reference to the variation of properties in the Periodic Table, which of the following is generally true?
(a) Atomic size increases from left to right across a period.
(b) Ionisation potential increases from left to right across a period.
(c) Electron affinity increases going down a group.
(d) Electronegativity increases going down a group.

Q. Write scientific reasons.
a. Atomic radius goes on decreasing while going from left to right in a period.
b. Metallic character goes on decreasing while going from left to right in a period.
c. Atomic radius goes on increasing down a group.
d. Elements belonging to the same group have the same valency.
e. The third period contains only eight elements even through the electron capacity of the third shell is 18 .

(i) Electropositive nature of the element(s) increases down the group and decreases across the period
(ii) Electronegativity of the element decreases down the group and increases across the period
(iii) Atomic size increases down the group and decreases across a period (left to right)
(iv) 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.

Which is the element with the smallest atomic size

Q. The size of atoms in any group shows a regular increase, the reason being as we go down any group:

Give scientific reasons:

1. Atomic size increases down the group.

2. Metallic character decreases from left to right in a period.

3. Elements in the same group show same valency.

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