Mixtures and Compounds

Question 1

What is a molecule?

Answer 1

More than one atom bonded together

Question 2

When is a molecule also a compound?

Answer 2

When the molecule is made from different types of atom (elements) bonded together.

Question 3

What is an element?

Answer 3

A type of atom

Question 4

When a metal reacts with a non-metal the resulting compound usually ends with..

Answer 4

-ide

Question 5

Iron + Sulphur –>

Answer 5

Iron + Sulhpur –> Iron Sulphide

Question 6

Magnesium + Oxygen –>

Answer 6

Magnesium + Oxygen –> Magnesium Oxide

Question 7

Sulphur + Oxygen –>

Answer 7

Sulphur + Oxygen –> Sulphur Dioxide

Question 8

Carbon + Oxygen –>

Answer 8

Carbon + Oxygen –> Carbon Dioxide

Question 9

Is a balloon filled with Nitrogen and Helium a mixture or a compound?

Answer 9

Mixture because the Nitrogen and Helium are not chemically bonded together

Question 10

How can we create a compound?

Answer 10

By adding heat

Question 11

How do we know a chemical reaction is taking place?

Answer 11

Heat is released
Light is released
Colour change

Question 12

Zinc + Sulphur –>

Answer 12

Zinc + Sulphur –> Zinc Sulphide

Question 13

Is carbon dioxide a compound?

Answer 13

Yes because it is made from atoms of carbon and oxygen chemically bonded together

Question 14

The reactants in a chemical reaction are…

Answer 14

what we start with

Question 15

The products of a chemical reaction are…

Answer 15

what we are left with at the end

Question 16

reactant + reactant —> _______

Answer 16

reactant + reactant –> product

Question 17

_______ + ______ –> product

Answer 17

reactant + reactant –> product

Question 18

What is meant by a reversible reaction?

Answer 18

When you can undo a reaction

Question 19

What is meant by an irreversible reaction?

Answer 19

When you cannot undo a reaction