Chemistry END OF YEAR EXAM Revision Flashcards Preview

Year 9 End Of Year Exam Revision > Chemistry END OF YEAR EXAM Revision > Flashcards

Flashcards in Chemistry END OF YEAR EXAM Revision Deck (55)
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1
Q

John Dalton discovered…

A

All matter is made of atoms, which are tiny, each element has its own type of atom

2
Q

John Dalton was wrong when he said…

A

Atoms are spheres that cannot be broken down, and we cannot create nor destroy them

3
Q

Mendeleev originally sorted the elements in order of…

A

Atomic mass

4
Q

Mendeleev did what to the elements with similar properties?

A

Put them in the same row

5
Q

Mendeleev left what for the future?

A

Gaps in the periodic table

6
Q

Elements are now arranged in order of…

A

Atomic number

7
Q

The columns in the periodic table are…

A

Groups

8
Q

The rows in the periodic table are called…

A

Periods

9
Q

The group number represents…

A

The amount of electrons in the outer shell of the atom

10
Q

Metal Properties

A

Dense, shiny, malleable, high melting point, good conductors of heat and electricity

11
Q

Non metal properties

A

Dull, brittle, low melting point, less dense, poor conductors of heat and electricity

12
Q

Isotope formula

A

(% x Amount of neutrons) + (% x Amount of neutrons)

—————————————————————————
100

13
Q

Filtration separates…

A

Insoluble solids from a liquid

14
Q

Separation techniques

A

Simple distillation, Fractional distillation, filtration, crystallisation, paper chromatography

15
Q

Paper chromatography separates…

A

A mixture of liquids using a solvent

16
Q

Rf value calculation

A

Distance moved by ink
————————————-
Distance moved by solvent

17
Q

Two phases of chromatography

A

Stationary phase, mobile phase

18
Q

Simple distillation is used to…

A

Separate a solvent and solute from a solution

19
Q

Describe simple distillation

A

The solution is heated until it boils (it should have anti bumping granules in), the solvent vapour evaporates travels up and along to the condenser. When the vapour reaches the cold glass it condenses as a distillate

20
Q

Fractional Distillation is used to…

A

Separate mixtures containing more than one liquid with different boiling points

21
Q

Crystallisation is used to…

A

Obtain a solute from a solvent

22
Q

Describe Crystallisation

A

The solution is heated to evaporate the solvent, leaving the solute that was dissolved into it. The solute is then left and crystals are formed.

23
Q

In crystallisation the quicker the solvent evaporates…

A

…the smaller the crystals will be

24
Q

Element

A

A single type of atom

25
Q

Compound

A

Two or more elements chemically bonded together

26
Q

Mixture

A

Two or more elements or compounds not chemically bonded together

27
Q

Pure

A

Contains a single type of element or compound

28
Q

Solvent

A

A liquid which has something dissolved in it

29
Q

Solute

A

A solid that may dissolve

30
Q

Solution

A

A mixture of a solute and a solvent

31
Q

Soluble

A

A substance that will dissolve

32
Q

Solid to liquid

A

Melting

33
Q

Liquid to solid

A

Freezing

34
Q

Liquid to gas

A

Evaporating/boiling

35
Q

Gas to liquid

A

Condensing

36
Q

Gas to solid

A

Deposition

37
Q

Solid to gas

A

Sublimation

38
Q

Molecule

A

Two or more atoms chemically joined together

39
Q

Solid properties

A

Fixed volume
Fixed shape
Cannot compress

40
Q

Liquid Properties

A

Fixed volume
Takes the shape of the container
Cannot compress
Can flow

41
Q

Gas properties

A

Fills a container if sealed
Can be compressed
Can flow

42
Q

If water is drinkable it is…

A

Potable

43
Q

Solid particle arrangement and movement

A

Closely packed
Uniform pattern
Vibrate on the spot

44
Q

Liquid particle arrangement and movement

A

Random pattern
Closely packed
Random movements

45
Q

Gas particle arrangement and movement

A

Randomly arranged
Little contact between particles
Fast moving in random directions

46
Q

Relative mass of a proton

A

1

47
Q

Relative mass of a neutron

A

1

48
Q

Relative mass of an electron

A

. 1
——-
1836

49
Q

Relative charge of a proton

A

+1

50
Q

Relative charge of a neutron

A

0

51
Q

Relative charge of an electron

A

-1

52
Q

Overall charge of the nucleus

A

+1

53
Q

Sodium atom electronic configuration

A

2,8,1

54
Q

How to make the Rf value more accurate in paper chromatography

A

Use a longer pice of paper

55
Q

What to do if there is a that liquid doesn’t dissolve when doing paper chromatography?

A

Use a different solvent