객관식
Where are valence electrons located in an atom?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
객관식
How many valence electrons does francium (Fr) have?
A
7
B
2
C
1
D
8
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검증된 단계별 안내1
Identify the position of francium (Fr) on the periodic table. Francium is an alkali metal located in Group 1.
Recall that elements in Group 1 have a single electron in their outermost shell, which corresponds to their valence electrons.
Understand that valence electrons are the electrons in the outermost energy level of an atom that participate in chemical bonding.
Since francium is in Group 1, it has 1 valence electron.
Therefore, the number of valence electrons in francium (Fr) is 1.
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