Physical and Chemical Change (Grade 10 NSC Matric Physical Sciences): Flashcards

Elements always combine in same proportion in a compound

H:O = 2:1

94% oxygen, 6% hydrogen

$H_2O_2$

1:1

Compounds, not mixtures

Gas volumes react in ratios of small whole numbers

2:1:2

1:3:2

Yes, e.g. $H_2O$ and $H_2O_2$