Topic 1 - atomic structure

Question 1

What is an element?

Answer 1

Contains only one type of atom

Question 2

What is a compound?

Answer 2

Consist of more than one type of atom

Question 3

Atoms are made of what?

Answer 3

• nucleus (protons and neutrons)
• electrons on rings around nucleus

Question 4

Conservation of mass?

Answer 4

An atom can neither be created or destroyed

Question 5

Name the state symbols

Answer 5

(s) - solid
(l) - liquid
(g) - gases
(aq) - aqueous

Question 6

What is a mixture?

Answer 6

Made up of two or more substances that aren’t chemically combined together

Question 7

Name techniques to separate mixtures by

Answer 7

• filtration
• crystallisation
• distillation

Question 8

How is separation possible with fractional distillation?

Answer 8

The different boiling points of the liquids in the mixture

Question 9

How is separation possible with paper chromatography?

Answer 9

The different solubilities of the mixtures in the solvent used

Question 10

Don’t Trust Rats Because Cancer

Answer 10

Dalton, Thompson, Rutherford, Bohr, Chadwick

Question 11

What model did Thompson make?

Answer 11

Plum pudding

Question 12

Name what atoms are made up of and their charges

Answer 12

Protons - +1
Neutrons - no charge
Electrons - -1

Question 13

Relative mass of each?

Answer 13

Proton - 1
Neutron - 1
Electron - 0.0005

Question 14

Atomic number = number of …..

Answer 14

Protons (and electrons)

Question 15

Mass number = ….. + …..

Answer 15

Number of protons + number of neutrons

Question 16

What are isotopes?

Answer 16

They are the same element but with different number of neutrons, identical chemical properties.

Question 17

Name the general electronic structure

Answer 17

2, 8, 8