A reduction in atomic size with increase in atomic number is a characteristic of elements of
high atomic masses
block
- block
radioactive series.
As we learnt in
Atomic Radii -
Atomic radii decrease with increases in atomic number from left to right but the unit of increment is very low.
- wherein
f-block element shows lanthanoid contraction due to which their size decreases with increase in atomic number.
Option 1)
high atomic masses
This option is incorrect.
Option 2)
block
This option is incorrect.
Option 3)
- block
This option is correct.
Option 4)
radioactive series.
This option is incorrect.
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