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Multiple Choice
Which group of elements has chemical properties most similar to those of phosphorus?
A
Oxygen, sulfur, and selenium
B
Sodium, potassium, and rubidium
C
Fluorine, chlorine, and bromine
D
Nitrogen, arsenic, and antimony
Verified step by step guidance
1
Identify the position of phosphorus in the periodic table. Phosphorus is in Group 15 (also called the nitrogen group or pnictogens).
Recall that elements in the same group (vertical column) of the periodic table have similar chemical properties because they have the same number of valence electrons.
Look for the group of elements that are in the same group as phosphorus, which means they should also be in Group 15.
Check each option to see which elements belong to Group 15: Nitrogen (N), Arsenic (As), and Antimony (Sb) are all in Group 15, just like phosphorus.
Conclude that the group containing nitrogen, arsenic, and antimony has chemical properties most similar to phosphorus because they share the same valence electron configuration.