Atoms

Question 1

Write the order the subatomic particles were found

Answer 1

Electron, proton, neutron

Question 2

What is the number above the element and what does it show?

Answer 2

Atomic mass number, shows the total number of protons and neutrons

Question 3

What is the number below the element and what does it show?

Answer 3

Atomic number, shows the number of protons which equal the number of electrons

Question 4

Why are atoms neutral overall?

Answer 4

They have the same number of protons and electrons

Question 5

What role did J.J. Thompson have in the discovery of the atomic model?

Answer 5

Discovered electrons and suggested the plum pudding model

Question 6

What role did Rutherford have in the discovery of the atomic model?

Answer 6

Suggested all the positive charge was in the nucleus

Question 7

What role did Bohr have in the discovery of the atomic model?

Answer 7

Discovered that electrons orbit in shells

Question 8

Where are electrons found?

Answer 8

Electrons are found on shells orbiting the
nucleus

Question 9

How many electrons can be placed in the first,
second and third shells?

Answer 9

2
8
8

Question 10

Is air an element, compound or
mixture? Why?

Answer 10

Mixture
There is O2, CO2 and nitrogen in the air

Question 11

What is chromatography used to
separate? Give an example

Answer 11

To separate out mixtures (usually liquids)
Colours in ink

Question 12

What can be separated using
filtration? Give an example

Answer 12

To separate insoluble solids from liquids
Sand and water

Question 13

What is evaporation used to
separate? Give an example

Answer 13

Soluble solids from a solution.
Salt and water