Multiple Choice
How many valence electrons does a neutral atom of tungsten (W) have?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
Multiple Choice
How many valence electrons does a potassium (K) atom have?
A
2
B
7
C
8
D
1
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Verified step by step guidance1
Identify the element in question, which is potassium (K).
Recall that the number of valence electrons corresponds to the electrons in the outermost shell of an atom.
Determine the electron configuration of potassium: \$1s^2 2s^2 2p^6 3s^2 3p^6 4s^1$.
Note that the outermost shell for potassium is the 4th shell, which contains only one electron in the 4s orbital.
Conclude that potassium has 1 valence electron because it has a single electron in its outermost energy level.
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