객관식
In a simplified model, what primarily determines the chemical properties (reactivity and bonding behavior) of an atom?
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9. Electrons in Atoms and the Periodic Table
Valence Electrons of Elements (Simplified)
Multiple Choice
How many valence (outer-shell) electrons does the element carbon (C) have?
A
8
B
6
C
4
D
2
검증된 단계별 안내1
Identify the element in question, which is carbon (C).
Recall that the number of valence electrons corresponds to the electrons in the outermost shell of an atom.
Determine the electron configuration of carbon: \$1s^2 2s^2 2p^2$.
Recognize that the outermost shell for carbon is the second shell, which contains the \$2s\( and \)2p$ electrons.
Count the electrons in the outermost shell: \(2\) electrons in \$2s\( plus \(2\) electrons in \)2p$, totaling \(4\) valence electrons.
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