How are electrons arranged inside an atom? Question 1 options: A) Whirling round

Question

How are electrons arranged inside an atom? Question 1 options: A) Whirling round the nucleus in any way they like B) Occupying different energy levels (max. 2 electrons per level). There are many more allowed energy levels than electrons in the atom, giving electrons the freedom to move between different levels C) Located inside the nucleus to ensure that it remains electrically neutral D) All at the same energy E) Occupying different energy levels (max. 2 electrons per level). There are only as many allowed energy levels as needed to accommodate all the electrons in the atom

Explanation / Answer

The answer is B. This is arrived at by solving quantum mechanical equations. You may just use the result for now.
The movement between different energy levels gives us the spectrum we observe.

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