Question

(Li),(Be),(B),(C),(N),(O),(F) Give reason to explain why atomic radii decrease from Li,F .

Answer 1

Answer:

every atom from Li to F has 2 orbitals and as no. increases proton increases which attract electrons more and atomic radius decreases..

Explanation:

Le has 3 protons in center but as going forward one proton increases and in florin it has 9 protons in center which attracts more than others.so going from Li to F atomic radius decreases...

Answer 2

Answer:In a period from left to right atomic radii decreases.

Explanation: This decrease is due to

1. Number of shells remains same as from Li to F all atoms have two shells or orbits.
2. Proton number in nucleus increases from 3 to 9 from Li to F.
3. As a result nucleus attracts more strongly from Li to F.