NEETChemistryd and f Block Elements
Why do ions of the same charge in a given series show a progressive decrease in radius with increasing atomic number?
Options
- ABecause the shielding effect of a d electron is not effective.
- BBecause the net electrostatic attraction between the nuclear charge and the outermost electron decreases.
- CBecause the new electron enters a d orbital each time the nuclear charge increases by unity.
- DBecause the variation within a series is quite small.
Correct answer
C. Because the new electron enters a d orbital each time the nuclear charge increases by unity.
Step-by-step solution
Ions of the same charge in a given series show a progressive decrease in radius with increasing atomic number because the new electron enters a d orbital each time the nuclear charge increases by unity.