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Answer:

A S [Ne]3s³3p⁴ instead of [Ne]3s²3p⁴

Explanation:

Hello,

To find the incorrect electronics configuration, we have to refer back to our periodic table or simply writing the electronic configuration of each element down follow principles guiding it such as Aufbau principle and Hund's rule.

a) S = [Ne] 3s³ 3p⁴ instead of [Ne] 3s²3p⁴

Option A is wrong.

S orbital can only accommodate a maximum of 2 electrons and in this case, 3s orbital is carrying 3 electrons. This has violated the rule.

b) Sn = [Kr] 5s² 4d¹⁰ 5p²

Option B is correct

c) Rb = [Kr] 5s¹

Option c is correct

d) V = 4s² 3d³

Option D is correct

e) I = [Kr] 5s² 4d¹⁰ 5p⁵

From the above, we can see that the answer is option A = S

Histrionicus

The following electron configurations incorrect is -  A) S [Ne]3s³3p⁴.

The electron configuration of an element describes how electrons are distributed in their atomic orbitals.

  • It follows a standard notation in which all electron-containing atomic subshells are placed in a sequence.
  • The atomic number of sulfur - 16, which means it has 16 electrons

The electronic configuration:

=> 1s² 2s² 2p⁶ 3s² 3p⁴

=> [Ne] 3s² 3p⁴ (Ne has 10 electrons with 1s² 2s² 2p⁶ electron configuration)

  • The given electronic configuration has 3 electrons in 3-s orbital instead of 2 electrons.

Thus, the following electron configurations incorrect is -  A) S [Ne]3s³3p⁴.

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