AP EAMCET20228 Jul 2022Evening ShiftChemistryStructure of AtomActual
The correct order of atomic radii of the elements O , N , S and P is
Options
- AN < P < S < O
- BN < O < P < S
- CO < N < P < S
- DO < N < S < P
Correct answer
D. O < N < S < P
Step-by-step solution
The atomic size decreases on moving from left to right in a period as the number of valence electrons in the same shell increases due to which the effective nuclear charge increases. Thus, size of O is less than N and also size of S is less than P . Now, on moving down in a group atomic size increases because each time one new shell is added and electrons in the outermost shell move away from the nucleus. Thus, size of O < S and N < P . Thus, the overall order is O < N < S < P .