Compounds (AQA GCSE Chemistry Combined Science): Flashcards

A substance containing two or more elements chemically joined together

Compounds have different properties from their elements

$H_2O$

Hydrogen and oxygen

2

3 atoms (2 H, 1 O)

$NaCl$

Sodium and chlorine

2 atoms (1 Na, 1 Cl)

$H_2SO_4$

Hydrogen, sulfur, oxygen

3

7 atoms (2 H, 1 S, 4 O)