C1

Question 1

What are all substances made of?

Answer 1

Atoms

Question 2

How many types of atoms do elements contain?

Answer 2

One

Question 3

How many atoms do compounds contain?

Answer 3

More than one type

Question 4

Describe an atoms centre.

Answer 4

A tiny nucleus as the centre surrounded by electrons.

Question 5

What is a mixture made up of?

Answer 5

Two or more substances that are not chemically combined together.

Question 6

How can mixtures be seperated?

Answer 6

By physical means such as filtration, crystallisation and simple distillation.

Question 7

Describe how to carry out paper chromatography?

Answer 7

Set a beaker up with the bottom filled with water. Then, draw a line on a slip of paper in pencil and along the line dot different colours of mixture/inc. After this attach a paper clip to the top of the paper and let it hang in the water allowing the water to move up the paper. The further up the paper the mixture travels the more soluble the mixture is.

Question 8

Who created the “plum pudding” model?

Answer 8

J.J. Thomson

Question 9

Who created the nuclear model of the atom?

Answer 9

Rutherford’s

Question 10

Who created the model of the atom used today?

Answer 10

Bohr

Question 11

What are atoms made of?

Answer 11

Protons, neutrons, electrons

Question 12

What is the relative charge of the following:
Proton
Neutron
Electrons

Answer 12

Proton= +1
Neutron= No overall charge
Electron= -1

Question 13

What is the relative mass of both proton and neutron?

Answer 13

1

Question 14

Why do atoms have no overall charge?

Answer 14

As the carry an equal charge of protons and electrons

Question 15

What does the atomic number Equal?

Answer 15

Number of protons( =number of electrons)

Question 16

What does the mass number equal?

Answer 16

Number of protons+neutrons

Question 17

What do atoms of the same element have the same number of?

Answer 17

Protons in their atoms

Question 18

What does atoms that gain electrons form?

Answer 18

Negative ions

Question 19

What do atoms that loose electrons form?

Answer 19

Positive ions

Question 20

In the periodic table, What does the top and bottom number represent?

Answer 20

Top= mass number
Bottom= atomic number

Question 21

What are isotopes?

Answer 21

Atoms of the same element with different numbers of neutrons.

Question 22

How are electrons in an atom arranged?

Answer 22

In energy levels or shells.

Question 23

How many electrons can the first and second shell hold?

Answer 23

First= 2
Second= 8

Question 24

When does the next shell start to fill?

Answer 24

When the shell before is full

Question 25

What does the number of electrons in the outermost shell determine?

Answer 25

The way that element reacts.