Multiple Choice
How many valence electrons does a sodium (Na) atom have?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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In which subshells are the valence electrons typically found for main group elements?
A
d and f subshells
B
only s subshell
C
only p subshell
D
s and p subshells
Verified step by step guidance1
Understand that valence electrons are the electrons in the outermost energy level (principal quantum number, n) of an atom that participate in chemical bonding.
Recall that main group elements are found in the s- and p-blocks of the periodic table, meaning their valence electrons occupy the s and p subshells of the highest principal energy level.
Recognize that d and f subshells are typically involved in transition metals and inner transition metals, not main group elements, so valence electrons in main group elements are not usually found there.
Therefore, for main group elements, valence electrons are typically found in both the s and p subshells of the outermost shell.
Summarize that the correct answer is that valence electrons for main group elements are found in the s and p subshells.
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