The atomic radius of an atom increases down the group due to_.
Correct answer: C. Increase in screening effect
- A. Decrease in distance between nucleus and outermost shell
- B. Increase in nuclear charge
- C. Increase in screening effect
- D. Decrease in number of shells
Explanation
The screening effect is the reduction of nuclear force on the outermost electrons due to inner shells. On moving down the group new shells are added due to which the number of inner shells increases and thus the screening effect also increases. This increase in screening effect causes the atomic radius to increase down the group.
Last updated
About Atomic Structure
Atomic structure covers the discovery of the proton, Planck's quantum theory, hydrogen emission spectra and the evidence for quantized energy levels. You will use quantum numbers to describe orbitals, distinguish s, p, d and f orbital shapes, and write electronic configurations, including the correct order of electron filling.
Practise Atomic Structure
922 free Atomic Structure MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
168 O-2 has how many electrons in s-orbitals?
3s2, 3p4 valence shell electronic configuration corresponds to ?
6Y = 2s12P1x2P1y2P1z this is_configuration
A 1-kW radio frequency of 880 KHz. How many quantas per second does it emit?
A 1kW radio transmitter operates at a frequency of 880 kHz. How many quanta per second does it emit?