Introduction

Question 1

What is matter?

Answer 1

Anything that has mass and takes up space.

Matter is the substance of which physical objects are made.

Question 2

Define an element.

Answer 2

One type of atom e.g. He.

Elements are pure substances that cannot be broken down into simpler substances.

Question 3

What is a compound?

Answer 3

Two or more types of atoms e.g. CuSO4.

Compounds are formed when two or more elements chemically bond together.

Question 4

What are pure substances?

Answer 4

Elements and Compounds.

Pure substances have a uniform and definite composition.

Question 5

What happens when elements or compounds transform into each other?

Answer 5

This is known as a chemical reaction.

Chemical reactions involve breaking and forming bonds between atoms.

Question 6

What are mixtures?

Answer 6

Homogeneous and Heterogeneous.

Mixtures consist of two or more substances that are not chemically combined.

Question 7

What is an alloy?

Answer 7

Mixture of metals