C1 ELC

1, What are the tiny particles that make up matter called?

• A) Compounds
• B) Elements
• C) Atoms
• D) Molecules

2, Roughly how many naturally occurring types of atoms are there?

• A) 50
• B) 75
• C) 100
• D) 150

3, Where are elements shown?

• A) In a textbook
• B) In the dictionary
• C) In the periodic table
• D) In the encyclopedia

4, What happens when two or more elements combine chemically?

• A) A solution is formed
• B) A mixture is formed
• C) A compound is produced
• D) A suspension is formed

5, Which part of the periodic table contains metals?

• A) Left and bottom
• B) Right and top
• C) Left and top
• D) Right and bottom

6, What can be used to separate mixtures of water and calcium carbonate with different particle sizes?

• A) Filtration
• B) Distillation
• C) Crystallisation
• D) Chromatography

7, What process can be used to separate mixtures through the movement of compounds different distances in a solvent?

• A) Distillation
• B) Filtration
• C) Crystallisation
• D) Chromatography

8, Two of the following are giant three-dimensional structures made of carbon atoms? Find one

• A) Graphite
• B) Sodium chloride
• C) Diamond
• D) Magnesium oxide

9, Which metals are found in the Earth as the metal itself without requiring chemical reactions?

• A) Gold
• B) Iron
• C) Copper
• D) Lithium

10, Which of the following is a property of polymers?

• A) High melting point
• B) Low density
• C) Conductivity of electricity
• D) Resistance to corrosion