Multiple Choice
How many valence electrons do barium (Ba) and phosphorus (P) have, respectively?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Which of the following atoms has six valence electrons?
A
Carbon (C)
B
Nitrogen (N)
C
Oxygen (O)
D
Fluorine (F)
Verified step by step guidance1
Recall that the number of valence electrons for main-group elements corresponds to the group number in the periodic table. For example, elements in group 16 have six valence electrons.
Identify the group number for each element: Carbon (C) is in group 14, Nitrogen (N) is in group 15, Oxygen (O) is in group 16, and Fluorine (F) is in group 17.
Understand that valence electrons are the electrons in the outermost shell of an atom, which participate in chemical bonding.
Since Oxygen (O) is in group 16, it has six valence electrons, which matches the question's requirement.
Therefore, by comparing the group numbers, Oxygen (O) is the atom with six valence electrons.
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