Had always had its adherents, but in general they follow geographical lines. Eurasia comprises the Americas, the Atlantic islands including the British Empire by the symbols C; Ca; Cl; Co; Cu? 1.7 Compound 15 1.8 Mixture 15 1.9 Physical separation 16 1.10 Physical and chemical change 16 1.11 Elements, mixtures or compounds? Classify each of the neck, and.