Atoms

Question 0

What type of substance is air?

Mixture, compound, element

Answer 0

A mixture.

Question 1

What is an element?

Answer 1

A substance that contains only one type of atom.

Question 2

What is a compound?

Answer 2

A substance that is made from two or more elements.

Question 3

What is a mixture?

Answer 3

A material system made up of two or more different substances which are mixed but are not chemically combined.

Question 4

What is an atom made up of?

Answer 4

Protons, neutrons and electrons.
The protons and neutrons make up the centre of the atom.
This is the nucleus.

Question 5

What relative charge do protons have?

Answer 5

+1

Question 6

What relative charge do electrons have.

Answer 6

-1

Question 7

What relative charge do neutrons have?

Answer 7

They have no electric charge.

They are neutral.

Question 8

True or false? Atoms carry a different number of protons to electrons?

Answer 8

False?

They are equal so they carry no overall charge.

Question 9

True or false? Does the atomic number equal the number of protons and the number of electrons?

Answer 9

True

Question 10

What is the mass number of an atom?

Answer 10

The atomic number + the number of neutrons.