Particle diagram before and after a reaction (hydrogen and oxygen)

An example figure from the Particle Diagram generator.

Two boxes with an arrow between: before, pairs of small white atoms and pairs of gray atoms; after, bent molecules of one gray and two white atoms and one pair of gray atoms left over, with a key naming H₂, O₂ and H₂O — Two boxes joined by an arrow show a reaction at the particle level. Before: four H₂ molecules (pairs of small white atoms) and three O₂ molecules (pairs of gray atoms). After: four H₂O molecules and one O₂ molecule left over. Every atom before is still there after, so mass is conserved, and O₂ is in excess: H₂ is the limiting reactant.

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What’s in the box

H₂ molecule, molecule (small white and small white): 4 before, 0 after
O₂ molecule, molecule (medium gray and medium gray): 3 before, 1 after
H₂O molecule, bent molecule (medium gray with 2 small white): 0 before, 4 after

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