객관식
Which of the following represents the valence electron configuration for a potassium (K) atom?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
객관식
What is the total number of valence electrons in a carbon atom in the ground state?
A
4
B
2
C
6
D
8
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검증된 단계별 안내1
Recall that valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.
Identify the atomic number of carbon, which is 6, meaning a carbon atom has 6 electrons in total.
Determine the electron configuration of carbon in the ground state: \$1s^2 2s^2 2p^2$.
Recognize that the valence electrons are those in the outermost shell, which for carbon is the second shell (the \$2s$ and \$2p$ orbitals).
Count the electrons in the \$2s$ and \$2p$ orbitals: \(2 + 2 = 4\) valence electrons.
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