Test Q&A

Question 1

What is an atom?

Answer 1

Tiny particles that have a mass

Question 2

What is an element?

Answer 2

A substance made from atoms with the same number of protons

Question 3

What are the symbols for:
Oxygen
Sodium 
Hydrogen
Lithium 
Copper
Potassium 
Argon 
Calcium

Answer 3

O
Na 
H
Li
Cu
K
Ar 
Ca

Question 4

What is the charge of a:
Proton
Neutron
Electron

Answer 4

Positive
No charge
Negative

Question 5

What is the mass of a:
Proton
Neutron
Electron

Answer 5

1
1
Negligible

Question 6

Why do atoms have no overall electrical charge?

Answer 6

The number of protons is the same as the number of electrons

Question 7

What does the atomic number tell you?

Answer 7

The number of protons in an atom

Question 8

What does the mass number tell you?

Answer 8

The number of protons and neutrons in an atom

Question 9

What is the symbol for:
Hydrogen 
Helium 
Lithium 
Beryllium 
Boron

Answer 9

H
He
Li
Be
B

Question 10

What is the atomic number of:
Hydrogen 
Helium
Lithium
Beryllium 
Boron

Answer 10

1
2
3
4
5

Question 11

What is the mass number of:
Hydrogen 
Helium 
Lithium 
Beryllium 
Boron

Answer 11

1
4
7
9
11

Question 12

What is the number of protons in:
Hydrogen
Helium
Lithium 
Beryllium 
Boron

Answer 12

1
2
3
4
5

Question 13

What is the number of neutrons in:
Hydrogen 
Helium 
Lithium 
Beryllium 
Boron

Answer 13

0
2
4
5
6

Question 14

What is the number of electrons in:
Hydrogen 
Helium
Lithium 
Beryllium 
Boron

Answer 14

1
2
3
4
5

Question 15

How many electrons in the outer shell of an element in group:
1
2
3
4
5
6
7
0

Answer 15

1
2
3
4
5
6
7
8

Question 16

What is a period?

Answer 16

A row across the periodic table

Question 17

Why do elements in the same group have similar properties?

Answer 17

They have the same number of electrons in their outer shell

Question 18

Where are transition metals on the periodic table?

Answer 18

The middle

Question 19

Where are alkali metals on the periodic table?

Answer 19

The first column

Question 20

Where are halogens on the periodic table?

Answer 20

The right side

Question 21

Where are noble gases on the periodic table?

Answer 21

The last column

Question 22

What is the word equation for CaO + CO2 > CaCO3

Answer 22

Calcium oxide + Carbon dioxide > Calcium Carbonate

Question 23

How many of each element is there in:
CaCO3
CaO
CO2

Answer 23

1 calcium, 1 carbon, 3 oxygens
1 calcium, 1 Oxygen
1 Carbon, 2 Oxygens

Question 24

Why does calcium chloride, an ionic compound, have a high melting point?

Answer 24

Because it has strong attractions between the ions

Question 25

Why is oxygen a gas at room temperature?

Answer 25

The forces between the molecules are weak

Question 26

What is a polymer?

Answer 26

Molecules made up of long chains of covalently bonded carbon atoms

Question 27

What is an ion?

Answer 27

A charged particle

Question 28

What type of bonding occurs between metals and non-metals?

Answer 28

Ionic bonding

Question 29

What type of bonding occurs between two non-metals?

Answer 29

Covalent bonding

Question 30

Do metals gain or lose electrons when forming ions? Positive or negative ion?

Answer 30

Lose | Positive

Question 31

Do nom-metals gain or lose electrons when forming ions? Positive or negative ion?

Answer 31

Gain | Negative

Question 32

What does malleable mean?

Answer 32

Can be bent into shape

Question 33

What properties of copper make it good for electrical wiring?

Answer 33

Very good conductor of electricity and not very reactive

Question 34

What properties of copper make it good for plumbing?

Answer 34

Easily bent into shape and not very reactive

Question 35

What is an isotope?

Answer 35

A different form of an element with the same number of protons but a different number of neutrons

Question 36

What are fullerenes?

Answer 36

Molecules of carbon shaped like closed tubes or hollow balls

Question 37

Describe the basic structure of graphite

Answer 37

3 covalent bonds Arranged in hexagons No covalent bonds between layers Delocalised electrons

Question 38

Describe the basic structure of diamond

Answer 38

4 covalent bonds Strong covalent bonds No free electrons

Question 39

Why are fullerenes good industrial catalysts?

Answer 39

They have a huge surface area

Question 40

What is chromatography used for?

Answer 40

A method to separate a mixture of soluble substances and identify them

Question 41

Name 3 different sources of water that can be made portable

Answer 41

Surface water Ground water Waste water

Question 42

What is deionised water?

Answer 42

It has the ions present in tap water removed

Question 43

What is the chemical definition of purity?

Answer 43

A substance made up of a single element or compound

Question 44

Describe how to carry out filtration

Answer 44

Used when the product is an insoluble solid, using filter paper and a funnel you can separate the solid from the liquid. The liquid runs through and the solid is left behind in the filter paper

Question 45

What separation technique should you use to separate a soluble solid from solution?

Answer 45

Crystallisation

Question 46

What happens to the forces between the particles in a solid as you melt it?

Answer 46

Particles gain more energy, increases vibrations and weaken the forces

Question 47

What is the ph value of a neutral substance?

Answer 47

7

Question 48

What is the ph value of an acid substance?

Answer 48

Anything from 1-6