객관식
How many valence electrons are available for bonding in silicon (Si)?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
객관식
How many valence electrons does neon (Ne) have?
A
10
B
6
C
2
D
8
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검증된 단계별 안내1
Identify the element in question, which is neon (Ne), with atomic number 10.
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) is full with 2 electrons and the second shell (2s and 2p) is the outermost shell for neon.
Count the electrons in the outermost shell: 2 (from 2s) + 6 (from 2p) = 8 valence electrons.
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