Question

Which of the following ratio will be more than unity?

• A. Atomic size of Nitrogen / Atomic size of Carbon
• B. Atomic Size of Fluorine / Atomic size of Nitrogen
• C. Atomic size of Neon/ Atomic size of Fluorine
• D. None of these

Answer 1

The correct option is C

Atomic size of Neon/ Atomic size of Fluorine

As we know that across periods the atomic size of the atom decreases but as an exception the size of the atoms of inert gases are bigger because there octet is complete and there is no effect of the nuclear pull. So atomic size of Neon is more than that of Fluorine and hence that ratio will be greater than unity.