The energy of electron in the first excited state of Hydrogen atom in J/atom is:
Correct answer: B. 0.545 × 10−18 J/atom
- A. 2.8 × 10−18 J/atom
- B. 0.545 × 10−18 J/atom
- C. −2.18 × 10−18 J/atom
- D. −1312.36 J/atom
Explanation
By using the formula for the energy of an electron in the nth orbitEn=-{me-4Z2/8 ε2 h2 n2}For hydrogen Z=1 and by putting values of constants also first excited state of hydrogen means, n=2 which is the second shell to which the ground state hydrogen electron has excited to. En= (-2.178×10-18)×1/n2
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