Hydrogen burns in oxygen: 2 H₂ + O₂ → 2 H₂O. A student draws the atoms before and after in four ways. Which drawing could be right, because no atom is lost or made?

ChemistryEasyHigh School (9–10)GeneralAtoms and Molecules › Laws of Chemical Combination

Hydrogen burns in oxygen: $2\,\text{H}_2 + \text{O}_2 \rightarrow 2\,\text{H}_2\text{O}$ . A student draws the atoms before and after in four ways. Which drawing could be right, because no atom is lost or made?

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