Chemistry Y9

Question 1

What is the relative mass and the electrical charge of a proton?

Answer 1

Relative mass: 1
Electrical charge: +1

Question 2

What is the relative mass and the electrical charge of an electron?

Answer 2

Relative mass: 0 (0.005)
Electrical charge: -1

Question 3

What is the relative mass and the electrical charge of a neutron?

Answer 3

Relative mass: 1
Electrical charge: 0

Question 4

Give the definition of a compound.

Answer 4

Two or more elements chemically bonded together.

Question 5

Give the definition of a molecule.

Answer 5

Two or more atoms chemically bonded together (these can be the same or different).

Question 6

Give the definition of a mixture.

Answer 6

Made of anything MIXED together (not chemically bonded).

Question 7

Give the definition of an element.

Answer 7

One type of atom.

Question 8

Give the definition of an atom.

Answer 8

One type of substance on its own.

Question 9

Where are the electrons in an atom?

Answer 9

Orbit the outside of the nucleus.

Question 10

Where are the protons in an atom?

Answer 10

In the nucleus (in the middle).

Question 11

Where are the neutrons in an atom?

Answer 11

In the nucleus (in the middle).

Question 12

What is a nucleus of atom made of?

Answer 12

Protons and neutrons.

Question 13

Nitrogen has a -3 electrical charge. Magnesium has a +2 electrical charge. Make Magnesium Nitrate by balancing the electrical charges.

Answer 13

Mg₃N₂

Question 14

Aluminium has a +3 charge. Bromine has a -1 charge. Make Aluminium Bromide by balancing the electrical charges.

Answer 14

AlBr₃

Question 15

Balance out this equation:
__Al + __HCl —> __H₂ + __AlCl₃

Answer 15

2Al + 6HCl —> 3H₂ + 2AlCl₃

Question 16

Balance out this equation:
__N₂ + __F₂ —> __NF₃

Answer 16

N₂ + 3F₂ —> 2NF₃

Question 17

Name the for states of mater

Answer 17

Solid, Liquid, Gas and Aqueous

Question 18

What do the groups of the periodic table tell us about the structure of the atom?

Answer 18

The number of electrons on the outer shell.

Question 19

What do the periods tell us about the structure of the atom?

Answer 19

The number of shells it has.

Question 20

Who created our final version of the periodic table?

Answer 20

Dimitri Mendeleev

Question 21

What is the name of the element 19?

Answer 21

Potassium (K)

Question 22

What does the atomic number represent?

Answer 22

The number of protons (or electrons)

Question 23

What does the atomic mass represent?

Answer 23

The mass of the protons + the neutrons (the nucleus).

Technically the mass of the whole atom but electrons have too small mass

Question 24

What equipment do you put a solution in to crystallise it?

Answer 24

Evaporation basin

Question 25

What is displacement?

Answer 25

Displacement is when a more reactive metal swaps with a less reactive metal. (Copper + Zinc sulfate —> Zinc + Copper sulfate)

Question 26

What is a base?

Answer 26

The oxide, hydroxide or carbonate that will react with an acid (insoluble)

Question 27

What is an alkali?

Answer 27

A base that dissolves in water (a soluble base)

Question 28

What are the products when you react a base with an acid?

Answer 28

A salt + water

Question 29

What are the products when you react a metal with a acid?

Answer 29

A salt and hydrogen

Question 30

What are the products when you react a metal carbonate with an acid?

Answer 30

A salt and water and carbon dioxide

Question 31

What salt ending do you get when you use sulphuric acid?

Answer 31

Sulfate

Question 32

What salt ending do you get when you use nitric acid?

Answer 32

Nitrate

Question 33

What salt ending do you get when you use Hydrochloric acid?

Answer 33

Chloride

Question 34

What salt ending do you get when you use citric acid?

Answer 34

Citrate

Question 35

What equipment is needed for titration?

Answer 35

Glass pipette, burette, funnel, conical flask beaker, retort stand, clamp, acid and base

Question 36

What is the point of titration?

Answer 36

To be able to find out how much acid is needed to neutralise an alkaline

Question 37

What kind of of hazard does a sign with a cross represent?

Answer 37

Harmful

Question 38

What kind of of hazard does a sign with an exclamation mark represent?

Answer 38

Generic caution

Question 39

What kind of of hazard does a sign with a skull represent?

Answer 39

Toxic

Question 40

What kind of of hazard does a sign with a lightning represent?

Answer 40

Electrical charge

Question 41

What kind of of hazard does a sign with intrelocked circles represent?

Answer 41

Biohazard

Question 42

What is the state symbol for oxygen?

Answer 42

(g)

Question 43

What is the state symbol of sodium hydroxide?

Answer 43

(aq)

Question 44

Is sodium hydroxide and acid or an alkali?

Answer 44

Alkali (hydr-)

Question 45

What is the elemental symbol of copper? | or the letter(s) on the perodic table

Answer 45

Cu

Question 46

What element is Na?

Answer 46

Sodium

Question 47

What is Oxygen's atomic number?

Answer 47

8

Question 48

What salt do you get if you combine Copper oxide + Nitric acid

Answer 48

Copper nitrate + water

Question 49

What does an acid release

Answer 49

Hydrogen (H+)

Question 50

What does an alkali release

Answer 50

Hydroxide (OH-)

Question 51

What are two safety precautions you must take when doing crystallisation

Answer 51

1. Wearing goggles in case acid splashes in your eye 2. Stand up in case Bunsen falls over onto your lap

Question 52

Define Ion

Answer 52

An atom that has a full outer shell with a positive or negative charge

Question 53

Define Isotope

Answer 53

An atom that has the same number of protons and electrons but a different number of neutrons

Question 54

If you added universal indicator to water and then added some nitric acid what would be the colour change

Answer 54

Green to Red

Question 55

If you added universal indicator to hydrochloric acid and then add double the amount of hydrogen peroxide. What would be the colour change

Answer 55

Red to Purple

Question 56

Insert the state symbols to this equation: Copper hydroxide ( ) + hydrochloric acid ( ) = Copper Chloride ( ) + Hydrogen ( )

Answer 56

Copper hydroxide (aq) + Hydrochloric acid (aq) = Copper chloride (aq) + Hydrogen (g)