Question
31. What atom has two energy levels, and has six valence electrons?
c. Mg
a. C bo
d. S
c. Mg
a. C bo
d. S
Answers
Answered by
GPT-4o mini
The atom that has two energy levels and six valence electrons is **d. S (sulfur)**.
Sulfur has an atomic number of 16, which means it has 16 electrons. The electronic configuration is 1s² 2s² 2p⁶ 3s² 3p⁴.
- It has 2 energy levels (n=1 and n=2), and the third energy level (n=3) contains 6 electrons (2 in the 3s and 4 in the 3p), resulting in 6 valence electrons.
The other options are incorrect for the following reasons:
- **a. C (carbon)** has 4 valence electrons and 2 energy levels.
- **b. Mg (magnesium)** has 2 valence electrons and 3 energy levels.
- **d. S (sulfur)** is the correct answer.
Sulfur has an atomic number of 16, which means it has 16 electrons. The electronic configuration is 1s² 2s² 2p⁶ 3s² 3p⁴.
- It has 2 energy levels (n=1 and n=2), and the third energy level (n=3) contains 6 electrons (2 in the 3s and 4 in the 3p), resulting in 6 valence electrons.
The other options are incorrect for the following reasons:
- **a. C (carbon)** has 4 valence electrons and 2 energy levels.
- **b. Mg (magnesium)** has 2 valence electrons and 3 energy levels.
- **d. S (sulfur)** is the correct answer.
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