Multiple Choice
How many valence electrons does xenon (Xe) have?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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How many valence electrons does a neutral neon (Ne) atom have?
A
6
B
2
C
10
D
8
Verified step by step guidance1
Identify the atomic number of neon (Ne), which is 10. This means a neutral neon atom has 10 electrons in total.
Recall that valence electrons are the electrons in the outermost shell (energy level) of an atom.
Determine the electron configuration of neon: \$1s^2 2s^2 2p^6$.
Recognize that the first shell (1s) holds 2 electrons and the second shell (2s and 2p) holds 8 electrons.
Conclude that the valence electrons are those in the second shell, so neon has 8 valence electrons.
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