Question

Electronic Configuration of Calcium is K L M N 2, 8, 8, 2 But we know that M shell can accomodate 18 electrons....So why can't we write 10 in M shell ?

Answer 1

according to the rule of electronic configuration, the maximum number of electrons accommodated by valence shell is 8.thus it is so.

Answer 2

According to one of the rules of electronic configuration, the maximum number number of electrons that can be accommodated in the valence shell is 8. Thus, M shell can hold a maximum of 18 electrons, however if it is the valence shell, the it cannot hold more than 8 electrons.

• The maximum number of electrons that can accommodate in the valence shell is eight, as stated by one of the laws of electronic configuration. As a result, the M shell can store up to 18 electrons, but if it's the valence shell, it can only hold 8 electrons.
• A basic understanding of how electrons are ordered in an atom can be gained from the notion of electrical configuration that you are studying at this time.
• Actually, there are subshells within each shell, and each subshell has a specific number of orbitals. The s subshell, p subshell, d subshell, and f subshell are the four different types of subshells. Each subshell may hold a specified number of electrons according to the number of orbitals it has.
• The fact that these orbitals are filled in ascending sequence of energy is another significant consideration.
• The reason why the atomic orbitals are filled in this particular order is what causes calcium's electrical configuration to be 2, 8, 8, 2, rather than 2, 8, 9, 1 or 2, 8, 10. Once you understand the idea of subshells and orbitals, it will also be easier to understand the rule that the valence shell cannot accommodate more than 8 electrons.

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