MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Trend in Atomic Radius

Assertion: In...

Question

Assertion:

In the periodic table, the atomic radius increases from left to right.
Reason:

The number of protons is increasing from left to right.

A

Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

B

Both Assertion and Reason are true, but Reason is not the correct explanation of the Assertion.

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

C

Assertion is true, but the Reason is false.

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

D

Assertion is false, but the Reason is true.

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

E

Both assertion and reason is incorrect

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

Open in App

Solution

The correct option is D Assertion is false, but the Reason is true.
In the periodic table, the atomic radius decreases from left to right.

The number of protons (the number of electrons and the atomic number) is increasing from left to right.

However, the effective nuclear charge increases as the screening effect are not proper.

Thus, Assertion is false, but the Reason is true.

Hence, the correct option is $D$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Assertion : Amount of cyanocobalamine required daily is 3 mcg
Reason : Its deficiency causes pernicious anaemia

Q. (i)
Assertion: A circle is not a rectilinear figure.
Reason: A figure formed by straight lines only is called a rectilinear figure.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.
(ii)
Assertion: All right angles are equal to one another.
Reason: A unique line passes through a single point.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.

Q. Assertion: C₄ – photosynthetic pathway is more efficient than C₃ pathway Reason: Photorespiration is suppressed in C₄ plants

Q. Assertion: The point O(0, 0) lies in quadrant I.
Reason: The point O(0, 0) lies on both the axes.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.

Q. Assertion: A cyclic parallelogram is a square.
Reason: Diameter is the largest chord in a circle.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Size of an Atom or Ion

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Trend in Atomic Radius

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon