Multi-Electron Configurations and Orbital Diagrams
For a hydroge...
Question
For a hydrogen atom, the energies that an electron can have are given by the expression, E=−13.58/n2eV, where n is an integer. The smallest amount of energy that a hydrogen atom in the ground state can absorb is:
A
1.00eV
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B
3.39eV
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C
6.79eV
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D
10.19eV
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Solution
The correct option is D10.19eV The smallest amount of energy that a hydrogen atom in the ground state can absorb is 10.19 eV. It is equal to the energy difference between first and second energy levels. For a hydrogen atom, the energies that an electron can have are given by the expression, E=−13.58/n2eV, where n is an integer. For first energy level, E1=−13.58/12eV=−13.58eV For second energy level, E2=−13.58/22eV=−3.395eV The difference E2−E1=−3.395eV−(−13.58eV)=10.19eV Hence, the option (D) is the correct answer.