C.1 Atomic Structure CQ

Question 1

What is an atom?

Answer 1

Smallest part of an element that can exist

Question 2

What is an element?

Answer 2

A substance made of only one type of atom

Question 3

What is a compound?

Answer 3

A substance made of two or more different atoms CHEMICALLY bonded

Question 4

How are compounds formed?

Answer 4

Form chemical reactions

Question 5

What is involved in chemical reaction?

Answer 5

• Formation of one or more new substances
• An energy change

Question 6

What is a molecule?

Answer 6

A substance made of more that one atom CHEMICALLY bonded

Question 7

What is a mixture?

Answer 7

A substance made of more than one thing NOT chemically bonded

Question 8

How can mixtures be seperated?

Answer 8

Physical Processes -
Filtration
Crystallisation
Simple distillation
Fractional Distillation
Chromotography

Question 9

Name the 3 sub atomic particles

Answer 9

Protons, Neutrons, Electrons

Question 10

State the charges and masses of the subatomic practiclea

Answer 10

Proton + 1, 1
Neutron 0, 1
Electron -1, negligible

Question 11

What is the plum pudding model? Who invented it?

Answer 11

• JJ Thompson
• A ball of positive charge with negative electrons studded into it

Question 12

What did the gold foil experiment prove? Who did it?

Answer 12

• Ernest Rutherford
• That atoms have a dense nucleus with a positve charge

Question 13

What did Chadwick discover?

Answer 13

The neutron

Question 14

What did Bohrs experiments show?

Answer 14

That electrons are in specific shells

Question 15

What is the atomic number of an atom

Answer 15

The amount of protons

Question 16

What is the mass number of an atom?

Answer 16

Number of protons and nuetrons

Question 17

In the electron shell model, how are the subatomic particles arranged?

Answer 17

• Nuetron and proton in nucleus
• Electron in shells

Question 18

Why is the number of electrons and protons equal in an atom

Answer 18

As their charges cancel out

Question 19

How many electrons go in the first shell and how many in the second?

Answer 19

2 then 8

Question 20

What do the groups tell you about an atom?

Answer 20

How many electrons in its outer shell

Question 21

What can a period tell you about an electron?

Answer 21

How many shells it has

Question 22

How large is an atom?

Answer 22

Radius of 0.1nm

Question 23

How large is the nucleus compared to the entire atoms?

Answer 23

1/10,000

Question 24

What is an isotope

Answer 24

Atoms of the same element but with a different amount of neutrons

Question 25

What is relative atomic mass?

Answer 25

An average value for the mass which takes into account all of its isotopes (Ar)

Question 26

What is the relative formula mass?

Answer 26

The sum of all of the relative masses of each atom in a compound Mr