Chemistry-Quantum Mechanical Model

NEET Chemistry Quantum Mechanical Model MCQ Question

Type: MCQ-numerical-Medium-Class 11

Calculate the energy of the first orbit (n=1) for a hydrogen-like species with atomic number Z=4 using the given formula: E = -21810 * Z^2 / n^2 J. What is the energy?

A

-349,760 J

B

-54,525 J

C

-218,100 J

D

-87,240 J

Correct Answer

Option A

Detailed Explanation

Using the given formula E = -21810 * Z^2 / n^2 J, substituting Z = 4 and n = 1 gives E = -21810 * 4^2 / 1^2 = -349,760 J.

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