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CHEMISTRY

JAMB 2006 - Question 35

Chemistry 2006 JAMB Past Questions - Question 35: The element with the electron configuration 1s² 2s² 2p³ is

Choose the correct answers from the options given.

The element with the electron configuration 1s² 2s² 2p³ is

A: calcium

B: chlorine

C: oxygen

D: nitrogen

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Correct Answer

Explanation

The electron configuration 1s² 2s² 2p³ corresponds to the nitrogen (N) atom. Let me break down the electron configuration for you:

- 1s²: This represents two electrons in the 1s orbital.
- 2s²: This represents two electrons in the 2s orbital.
- 2p³: This represents three electrons in the 2p orbitals.

Adding them up, you have a total of 2 + 2 + 3 = 7 electrons. The atomic number of nitrogen is 7, indicating that it has 7 electrons. Therefore, the element with this electron configuration is nitrogen (N).