This bingo card has 20 words: Free!, PO₄³⁻, C₂H₃O₂⁻, CN⁻, CO₃²⁻, NO₂⁻, NO₃⁻, Ag⁻, Zn²⁺, SO₃²⁻, SO₄²⁻, CrO₄²⁻, Cr₂O₇²⁻, O₂²⁻, NH₄⁺, ClO₃⁻, Cd²⁻, OH⁻, Ag⁺ and ClO₂⁻.
Polyatomic Ions | Polyatomic Ions | Polyatomic Ions | Polyatomic Ions | Chemical Formula
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With players vying for a you'll have to call about __ items before someone wins. There's a __% chance that a lucky player would win after calling __ items.
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