Chapter 5 (Collins Stage 7 Science)

A (a)   is made up of 2 or more atoms strongly bonded.

What is a substance made after a chemical reaction?

• risk

• product

• reactant

• model

What is something that cant dissolve?

• solution

• soluble

• insoluble

• neutralisation

_____ variable is something you keep the same during an investigation

• control

• dependent

• constant

Which symbol shows a chemical reaction has occured?

• A

• B

• C

• D

You are testing a solution's pH, it reads, 3.02. What type of solution is it?

(a)  

Identify the product(s) in this word equation

• Sodium

• Sodium chloride

• Sodium and Chlorine

• Sodium and sodium chloride

Magneisum reacts with oxygen to form magnesium oxide. The correct word equation is...

• A

• B

• C

• D

copper sulfate and sodium silicate react to make copper silicate and sodium sulfate. What are the reactants?

(a)  

Sodium reacts with chlorine to produce sodium chloride. Choose the correct word equation.

• sodium chloride → chlorine + sodium

• sodium + carbon dioxide → sodium carbonate

• sodium + chlorine → sodium chloride