How many electrons can the n = 4 shell hold?
1. 8
2. 16
3. 32
4. 64

3. 32

Explanation:

The maximum electronic population of an energy level is given by the expression , in which n represents the number of the level. This, however, is a theoretical maximum, since from level 4 onwards this value is never reached, due to the preposition of the sub-levels.

when it is required to know the number of electrons of a level, it is more appropriate to obtain it based on the electronic configuration by sub-levels, as shown in the attached image.

So, for n=4 we have:

That is a total of 32 electrons (2+6+10+14).

You can calculate that by 2n² = 2(4)² = 2 * 16 = 32.

So, ANSWER IS (3).32

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