Question

Atomic size along the period

Answer 1

Answer:

decrease

when we go from left to right nuclear charge increases,this result in decrease in size

Answer 2

Solution

As we go from left to right in Modern Periodic table then atomic radii of an atom decreases this is because nuclear charge increases by 1 unit in each step but number of electrons are added in same shell hence electron cloud experience more nuclear charge thus size decreases.

Size of noble gases are extraordinary bigger than their proceeding groups because

• electronic repulsion act very strongly.
• Also due to vanderwall Radii between their molecule noble gases exist in molecular form due to which they have vanderwall radius.

Groups :-

as we go from top to bottom in periodic table then atomic radii increases this is because addition of electron takes place in new shell at each step hence effective nuclear charge decreases Thus atomic radii increases