Which of the following elements has its valence electrons in the s-orbital?
CHEMISTRY
WAEC 2023
Which of the following elements has its valence electrons in the s-orbital?
- A. Aluminum
- B. Phosphorus
- C. Sodium
- D. Carbon
Correct Answer: C. Sodium
Explanation
Sodium is an alkali metal, and its atomic number is 11. This means that it has 11 electrons, and its electron configuration is \(1s^2 2s^2 2p^6 3s^1\). The valence electrons are the electrons in the outermost shell, which in this case is the 3s orbital.
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