SC-57
Chemical formulae
Lower Sec Science · Secondary 1 · Medium · Chemical formulae
Which statement correctly compares a molecule of oxygen gas,
O₂, and a molecule of carbon dioxide gas, CO₂?
O₂, and a molecule of carbon dioxide gas, CO₂?
- Both are elements because each formula has only one type of letter.
- Both are compounds because each formula has a subscript 2.
- O₂ is an element; CO₂ is a compound.
- O₂ is a compound; CO₂ is an element.
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