Multiple Choice
How many valence electrons does each carbon atom have?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Which of the following represents the valence electron configuration for a neon (Ne) atom?
A
2s^2 2p^4
B
2s^2 2p^2
C
2s^2 2p^6
D
2s^2 2p^5
Verified step by step guidance1
Step 1: Identify the atomic number of neon (Ne), which is 10. This means a neutral neon atom has 10 electrons in total.
Step 2: Recall the electron configuration order based on energy levels and sublevels: 1s, 2s, 2p, 3s, etc.
Step 3: Fill the electrons starting from the lowest energy level: 1s can hold 2 electrons, so the first 2 electrons go there.
Step 4: Next, fill the 2s sublevel with 2 electrons, bringing the total to 4 electrons accounted for.
Step 5: The remaining 6 electrons fill the 2p sublevel, which can hold up to 6 electrons, completing the valence shell configuration as $2s^{2} 2p^{6}$.
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