MediumChemistryHigh School (9–10)GeneralStructure of the Atom › Subatomic Particles and Atomic ModelsConceptualBoard Exam

Use the energy levels of hydrogen: K -13.6 eV, L -3.4 eV, M -1.51 eV, N -0.85 eV…

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Use the energy levels of hydrogen: K $-13.6\ \text{eV}$ , L $-3.4\ \text{eV}$ , M $-1.51\ \text{eV}$ , N $-0.85\ \text{eV}$ . For each jump, say whether energy is taken in or given out, and how much.

L to M
N to L
M to K
K to N

Need a reminder? The key ideaShow

In Bohr's model, electrons move only in fixed shells, K, L, M, N, each with a fixed energy. An electron in a shell does not lose energy. A jump to a higher shell takes in energy; a fall to a lower shell gives out the difference as light. In hydrogen, the levels are K $-13.6\ \text{eV}$ , L $-3.4\ \text{eV}$ , M $-1.51\ \text{eV}$ and N $-0.85\ \text{eV}$ .

The worked solution

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Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.

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← In a hydrogen atom, the L shell has an energy of -3.4 eV and the K shell has -13.6 eV…Use the formula 2n² to find the most electrons that the K, L, M and N shells can hold… →

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