Multiple Choice
How many valence electrons does a potassium (K) atom have?
Table of contents
- 1. Intro to General Chemistry3h 48m
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- 23. Chemistry of the Nonmetals2h 39m
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- 24. Transition Metals and Coordination Compounds3h 19m
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- Ligands10m
- Complex Ions5m
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- Magnetic Properties of Complex Ions: Octahedral Complexes11m
- 1. The Chemical World10m
10. Periodic Properties of the Elements
Valence Electrons of Elements
Multiple Choice
How many valence electrons does helium (He) have?
A
2
B
8
C
1
D
0
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Verified step by step guidance1
Identify the element in question, which is helium (He).
Recall that valence electrons are the electrons in the outermost shell of an atom.
Determine the electron configuration of helium. Since helium has an atomic number of 2, it has 2 electrons.
Write the electron configuration for helium: \$1s^2$, meaning both electrons are in the first shell, which is also the outermost shell for helium.
Conclude that helium has 2 valence electrons because its only shell (the first shell) is full with 2 electrons.
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