Question

What is the electron configuration of chlorine (CI)? O 1s?2s?2p°3s?3p³
O 1s2s?2p3s?3p5
O 1s2s22p3s?4s?3p3
O 1s?2s?2p3s?3p²3d

its urgent ​

Answer 1

[Ne] 3s² 3p⁵

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Answer 2

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• Chlorine is a halogen located in group 7A and period 3 of the periodic table.

• We can write the electron configuration of this element.

 Since it is in period 3, the highest configuration level will be at 3.

• Chlorine is also located in the p block (nonmetal) section of the table, so the final part of the written configuration will involve "3p".

Recall that:

• S block: up to 2 electrons
• P block: up to 6 electrons
• Chlorine has 17 electrons

Now,

• Fill in the order of s block to p block.
• The first level only goes up to an s block.
• The configuration should sum up to 17 total electrons in total.

.

Hence,

We can write the configuration as:

$\boxed{\footnotesize{\sf{\red{Cl}:-\blue{1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}}}}}$

$\sf{\color{aquamarine}{@Smaranika54}}$