Chem

Question 1

What are the horizontal rows on the periodic table called?

Answer 1

periods

Question 2

What are the vertical columns on the periodic table called?

Answer 2

groups

Question 3

What is group 1 of the periodic table called?

Answer 3

alkali metals

Question 4

What is group 2 of the periodic table called?

Answer 4

alkaline earth metals

Question 5

What is the section in the middle of the periodic table called?

Answer 5

transition metals

Question 6

What is group 7 in the periodic table called?

Answer 6

the halogens

Question 7

What is group 0 in the periodic table called?

Answer 7

the noble gases

Question 8

What side of the periodic table are the non-metals on?

Answer 8

right

Question 9

What is an atom?

Answer 9

The smallest particle of a chemical element that can exist.

Question 10

What is an element?

Answer 10

A substance consisting of atoms which all have the same number of protons.

Question 11

Balance the equation:
Mg+O2→MgO

Answer 11

2Mg+O₂→2MgO

Question 12

Balance the equation H₂+O₂→H₂O

Answer 12

2H₂+O₂→2H₂O

Answer 13

BaCl₂+LiSO₄→2LiCl+BaSO₄

Question 14

magnesium+oxygen→

Answer 14

magnesium oxide

Question 15

Definition of insoluble

Answer 15

A substance that does not dissolve.

Question 16

Definition of mixture

Answer 16

Two substances that are mixed but not chemically joined.

Question 17

Definition of distillation

Answer 17

Separates substances with different boiling points.

Question 18

Soluble definition

Answer 18

A substance that dissolves.

Question 19

Filtration definition

Answer 19

Separates insoluble substance from soluble substances.

Question 20

Compound

Answer 20

Atoms of 2 or more elements that are chemically joined.

Question 21

Crystallisation

Answer 21

Used to obtain a soluble substance from a solution.

Question 22

Which separation technique separates a liquid from the solid dissolved in it?

Answer 22

simple distillation

Question 23

Which separation technique separates miscible liquids that dissolve in each other?

Answer 23

fractional distillation

Question 24

Which separation technique separates soluble substances?

Answer 24

chromatography

Question 25

Which separation technique separates insoluble solids from liquids?

Answer 25

filtration

Question 26

Which separation technique separates a solid from the liquid dissolved in it?

Answer 26

crystallisation

Question 27

Which separation technique works by the solution becoming too concentrated for all the solid to remain dissolved?

Answer 27

crystallisation

Question 28

Which separation technique works by the liquid evaporating but not the solid?

Answer 28

simple distillation

Question 29

Which separation technique works by an insoluble substance not passing through filter paper?

Answer 29

filtration

Question 30

Which separation technique works by one or more insoluble liquid being more attracted to a solid such as paper and therefore not travelling as far as the other?

Answer 30

chromatography

Question 31

Which separation technique works by liquids with higher boiling points staying in the flask until those with lower boiling points have evaporated?

Answer 31

fractional distillation

Question 32

What is the use of chromatography?

Answer 32

To identify the dyes used to colour foods.

Question 33

What is the use of crystallisation?

Answer 33

To obtain pure crystals of compounds used in medicine.

Question 34

What is the use of simple distillation?

Answer 34

To obtain fresh water from seawater.

Question 35

What is the use of fractional distillation?

Answer 35

To separate crude oil into different fuels such as petrol and diesel.

Question 36

What is the use of filtration?

Answer 36

To remove solids before waste water is purified.

Question 37

When did we discover that everything was made of matter?

Answer 37

1803

Question 38

Who discovered that everything was made of matter?

Answer 38

John Dalton

Question 39

Who suggested that elements contain identical atoms?

Answer 39

John Dalton

Question 40

Who discovered electrons?

Answer 40

JJ Thomson

Question 41

What do you call tiny particles with a negative charge?

Answer 41

electrons

Question 42

Who suggested that an atom is a positively charged sphere with negative electrons distributed throughout it?

Answer 42

JJ Thomson

Question 43

What did Thomson's model become known as?

Answer 43

the plum pudding model

Question 44

Who tested the plum pudding model?

Answer 44

Geiger and Marsden

Question 45

When was the plum pudding model tested?

Answer 45

1909

Question 46

What did Geiger and Marsden do?

Answer 46

Set up a very thin layer of of gold foil and fired alpha particles.

Question 47

What happened to the alpha particles in the gold foil?

Answer 47

Most went straight through but some were deflected.

Question 48

What did Geiger and Marsden prove?

Answer 48

Atoms have a mass in the middle.

Question 49

Who suggested that an atom is mostly empty space with its positive charge and most of its mass is a tiny central nucleus?

Answer 49

Rutherford

Question 50

What do electrons orbit?

Answer 50

The nucleus

Question 51

Which particle was discovered to change the model of an atom?

Answer 51

electron

Question 52

What type of particle was directed at the gold atoms?

Answer 52

alpha

Question 53

Which particle has the lowest mass?

Answer 53

electron

Question 54

Which scientist first suggested that electrons orbit the nucleus at specific distances?

Answer 54

Neils Bohr

Question 55

Atoms of the same element have the same atomic number because they have the same number of _______.

Answer 55

protons

Question 56

Atoms have no overall charge because they have the same number of _______ and _________.

Answer 56

protons, electrons

Question 57

Separating blue food colour from a mixture of food colours is an example of ______________.

Answer 57

chromatography

Question 58

Separating copper sulphate from copper sulphate solution is an example of ________________.

Answer 58

crystallisation

Question 59

Scientist now know that atoms are actually made from even smaller particles. What are the three types?

Answer 59

proton neutron electron

Question 60

Protons have what charge?

Answer 60

+1

Question 61

Neutrons have what charge?

Answer 61

0

Question 62

Electrons have what charge?

Answer 62

-1

Question 63

Protons and _______ have the same mass.

Answer 63

neutrons

Question 64

number of protons + number of neutrons →

Answer 64

mass number

Question 65

If an atoms has mass number 16 and atomic number 8, how many protons, neutrons and electrons are there?

Answer 65

8,8,8

Question 66

Whilst atoms of a given element always have the same number of protons, they may have different numbers of neutrons. Atoms which differ in this way are called _________.

Answer 66

isotopes

Question 67

Which type of substance is hydrogen?

Answer 67

element

Question 68

Sand can be separated from a mixture of sand and water by __________.

Answer 68

filtration

Question 69

Suggest what would happen to the temperature of the water as it flows through a condenser?

Answer 69

it gets warmer

Question 70

How do you obtain sodium chloride solution by crystallisation?

Answer 70

Heat up the solution until the liquid evaporates.

Question 71

How is the electron arrangement is written?

Answer 71

2,8,8

Question 72

What is the maximum electrons held in the 1st shell of an atom?

Answer 72

2

Question 73

What is the maximum electrons held in the 2nd shell of an atom?

Answer 73

8

Question 74

What is the maximum electrons held in the 3rd shell of an atom?

Answer 74

8