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MYSTERY ELEMENT
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Identify this element
Daily Challenge
5 questions · new set every day · race the clock
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Reaction simulator
Select two elements to see what compound they form.
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Molar mass calculator
Enter a chemical formula. Supports parentheses (e.g., Ca(OH)₂) and hydrates (CuSO4·5H2O or CuSO4.5H2O).
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Teacher controls
Select elements to restrict Quiz, Speed Round, Flashcards, and Game to a specific set.
Active lock
No lock active — all 118 elements available.
Generate printable quiz
Creates a worksheet using the locked element set.
questions
The student worksheet contains no answers. "Print answer key" reprints the same question set with the key column for the teacher.