Question

electronic configuration of SCANDIUM is
2,8,8,3
but are teacher says it is 2,8,9,2;HOW???​

Answer 1

Answer:

Scandium has an atomic number of 21. The outer most valence is two electrons instead of three, because the forth shell has lesser energy than the third, so the third shell add more electron become 9, so the electronic configuration of Scandium is 2,8,9,2.

Answer 2

Actually, the electronic configuration of Scandium is 2,8,8,3 but the teacher says it is 2,8,9,2 because the K shell accommodates more 2 electrons than the base electrons and the energy lowers in the fourth shell as compared to the third shell, that's why the electronic configuration will be 2,8,9,2.

The arrangement of electrons within an atom's orbitals is known as its electronic configuration. The atomic number, which is equal to the number of protons in every neutral atom, is the fixed quantity of electrons that make up each neutral atom.

The octet rule states that an atom's outermost shell can hold no more than 8 electrons (except the K shell which can accommodate a maximum of 2 electrons).

The atomic number of scandium is 21. Due to the fourth shell's lower energy than the third, which results in the third shell adding more electrons to become 9, the outermost valence has two rather than three electrons, making the electronic configuration of Scandium 2,8,9,2.

For more such questions on The Periodic table: https://brainly.in/question/34304805

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