Why Does the Third Electron Shell Hold Up to 18 Electrons, Not Just 14?
Discover why the third electron shell can hold up to 18 electrons, explained with s, p, and d subshell capacities and common misconceptions.
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14 electrons in the third shell is a common misconception. The third shell actually has a maximum capacity of 18 electrons. This shell comprises the s (2 electrons), p (6 electrons), and d (10 electrons) subshells. The misconception likely arises from discussing the d subshell, which can hold up to 10 electrons but is not 'filled' until the fourth energy level (n=4). Thus, while the 3rd energy level can eventually accommodate 18 electrons, the d-orbital filling contributes to this total when considering its energy state rather than its spatial classification.
FAQs & Answers
- How many electrons can the third shell hold? The third electron shell can hold up to 18 electrons, encompassing the s (2 electrons), p (6 electrons), and d (10 electrons) subshells.
- Why do some sources say the third shell only holds 14 electrons? This misconception arises because the d subshell, which can hold 10 electrons, only starts filling fully when reaching the fourth energy level (n=4), leading to confusion about the third shell's capacity.
- What are the electron subshells in the third shell? The third shell contains the s, p, and d subshells, which can hold 2, 6, and 10 electrons respectively.