Structure and properties of materials

What is meant by a chemical property of a substance?

• A property that is seen when a substance takes part in a chemical change

• A property that is seen when a substance takes part in a physical change

Hydrogen is a colorless gas. It has a low density and is highly reactive. Give one chemical property and two physical properties of hydrogen

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Give the name of a substance which changes colour to show whether a substance is an acid, alkali or neutral

Describe the difference in movement of particles in solids and liquids

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What is a vacuum?

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A chemical reaction between hydrochloric acid and magnesium produces magnesium chloride (MgCl2). It is

• Element

• Compound

• Mixture

• Alloy

An alloy is a mixture of metal with others elements

• True

• False

• I don't know

which type(s) of energy are often used to separate compounds

• Sound

• Heat

• Electrical

• Light

A substance made of only one type of atom is called —

• an element
• a mixture
• a compound
• a salt

A pure substance...

• is an element or a compound
• is an element or a mixture
• is a compound or a mixture
• is a mixture