Question

The table shows the atomic radii of four elements.

Element Atomic Radii (m)
Potassium 2.2 × 10-7
Argon 7.1 × 10-8
Boron 8.5 × 10-8
Silver 1.6 × 10-7

Which list shows the atomic radii of the elements ordered from greatest to least?

Answer 1

The order is

• Potassium>Silver>Boron>Argon

Shortcut trick :-

The nature of atomic radii in. periodic table

• Decrease in a period from left to right.
• Increase in a group from up to down

Answer 2

`\sf Potassium \ : \ 2.2 * 10^(-7)`

`\sf Argon \ : \ 7.1 * 10^(-8)`

`\sf Boron \ : \ 8.5 * 10^(-8)`

`\sf Silver \ : \ 1.6 * 10^(-7)`

greatest to least :

• Potassium < Silver < Boron < Argon