QQuestionChemistry
QuestionChemistry
"How many valence electrons does magnesium (Mg) have?
A. 12
B. Six
C. Three
D. Two"
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Answer
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Step 1:I'll solve this problem step by step following the specified LaTeX formatting guidelines:
Step 2:: Determine the atomic number of magnesium
- Magnesium (Mg) is located in the periodic table with an atomic number of 12 - The atomic number represents the number of protons in the nucleus
Step 3:: Identify the electron configuration of magnesium
- The electron configuration of magnesium is $$1s^{2} 2s^{2} 2p^{6} 3s^{2}
- Total electrons = 12
Step 4:: Locate the valence electrons
- Number of valence electrons = $$2
- Valence electrons are the electrons in the outermost shell - For magnesium, these are the electrons in the 3s orbital
Step 5:: Verify the answer choices
- Checking the given options: A. 12 (total electrons) - Incorrect B. Six - Incorrect C. Three - Incorrect D. Two - Correct ✓
Final Answer
Two valence electrons
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