Page 46 - ICSE Chemistry 8

3 Elements, Compounds and

Mixtures

Learning Outcomes Key Concepts
Students will be able to
• Elements, Compounds
• recall previous knowledge related to elements, compounds and mixtures.
and Mixtures—A Quick
• classify substances into elements, compounds and mixtures on the basis
Recall
of their proper es.
• Pure Substances
• perform ac vi es to separate components of a mixture.
• Mixtures
• explain the principle involved in using a par cular technique in separa ng • Separation of Mixtures
a mixture.
• Combining Methods for
Separating Mixtures

Warm Up Activity

Based on your previous knowledge about elements, compounds and mixtures, answer the following ques ons.
• Name the simplest form of a pure substance made up of only one kind of atom. ____________________

• Name the smallest par cle of an element. ____________________
• Name the categories into which elements can be broadly divided. ____________________

• Name a pure substance that is formed when two or more elements chemically combine in a defi nite
propor on by mass. ____________________

• Name a group of atoms held by some force exis ng together as one species and possessing characteris c
proper es. ____________________

ELEMENTS, COMPOUNDS AND MIXTURES—A QUICK RECALL

You have learnt about elements, compounds and mixtures in previous classes. Let’s now revise these
concepts.

Ma er is anything which has mass and occupies space. Ma er can be broadly classifi ed into two categories:
pure substances and mixtures. Pure substances are further classifi ed as elements and compounds.

Ma er

Pure Substances Mixtures

Elements Compounds

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