Which of the following elements has its valence electrons...
Which of the following elements has its valence electrons in the s-orbital?
Aluminum
Phosphorus
Sodium
Carbon
Correct answer is C
Sodium is an alkali metal, and its atomic number is 11. This means that it has 11 electrons, and its electron configuration is 1s22s22p63s1. The valence electrons are the electrons in the outermost shell, which in this case is the 3s orbital.
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