Why Are Only 8 Electrons Filled in the M Shell Despite Its 18-Electron Capacity?
Learn why only 8 electrons fill the M shell's first part, aligning with the octet rule for atomic stability.
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The M shell can hold a maximum of 18 electrons, but due to energy distribution, only 8 electrons fill the first part of the M shell. This configuration makes atoms more stable, following the octet rule, which states that atoms are most stable with 8 electrons in their valence shell.
FAQs & Answers
- What is the maximum number of electrons the M shell can hold? The M shell can hold a maximum of 18 electrons, but energy considerations typically result in only the first 8 electrons filling initially.
- Why does the octet rule favor 8 electrons in the valence shell? The octet rule states that atoms are most stable when their valence shell has 8 electrons, resembling the electron configuration of noble gases.
- How does electron energy distribution affect shell filling? Electron filling follows energy levels, so even though the M shell can hold 18 electrons, only the lower energy subshells get filled first, usually accommodating 8 electrons.