Correct Answer: Tetra-atomic
Subject: chemistry
Explanation: • <b>Key Fact</b> Phosphorus naturally exists as a polyatomic molecule containing 4 atoms, denoted as P₄. • <b>Supporting Detail</b> Therefore, its atomicity is 4, making it a tetra-atomic molecule. • <b>Related Concept</b> Noble gases are monoatomic (1). Oxygen/Nitrogen are diatomic (2). Ozone is triatomic (3). Sulfur is octa-atomic (8, S₈). • <b>Why wrong options are wrong</b> Options A, B, and C incorrectly state the atomicity of Phosphorus. • <b>Exam Trick</b> Remember two common polyatomic exam elements: Phosphorus = P₄ (4), Sulfur = S₈ (8). • <b>Additional Info</b> Phosphorus was first isolated by Hennig Brand in 1669.
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