EASYMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryAtomic StructureIntro
Assertion (A): The radius of the first orbit of hydrogen atom is 0.529 Å. Reason (R): Radius of each circular orbit rₙ = 0.529 × (n²/Z) Å, where n = 1,2,3 and Z = atomic number.
0.Both A and R are correct and R is the correct explanation of A.
1.Both A and R are correct but R is NOT the correct explanation of A.
2.A is correct but R is incorrect.
3.R is correct but A is incorrect.
Explanation
Both assertion and reason are correct, and the formula rₙ = 0.529 n²/Z Å correctly explains why r₁ = 0.529 Å for H (n=1, Z=1).
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