Multiple Choice
How many groups are present in the modern periodic table?
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2. Atoms & Elements
Periodic Table: Group Names
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Which metalloid on the periodic table has three valence electrons?
A
Silicon (Si)
B
Boron (B)
C
Arsenic (As)
D
Antimony (Sb)
Verified step by step guidance1
Understand that metalloids are elements with properties intermediate between metals and nonmetals, and they are located along the zig-zag line on the periodic table.
Recall that the number of valence electrons corresponds to the group number for main-group elements, especially in groups 13 to 18.
Identify the group numbers of the given metalloids: Boron (B) is in group 13, Silicon (Si) in group 14, Arsenic (As) in group 15, and Antimony (Sb) in group 15.
Since group 13 elements have three valence electrons, recognize that Boron (B) has three valence electrons.
Confirm that the other metalloids listed have different numbers of valence electrons based on their group numbers, so Boron is the metalloid with three valence electrons.
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