Elements, Compunds And Mixtures

Question 1

Name the order of the most reactive to the least reactive metals

Answer 1

Potassium, sodium, calcium, magnesium, aluminium, zinc, iron, tin, lead, copper, silver, gold, platinum

Question 2

What is an element

Answer 2

Contains just one type of atom

Question 3

What is a compound

Answer 3

Contains two or more atoms joined together

Question 4

What is a mcxture

Answer 4

Contains two or more different substances they are not joined together

Question 5

Name three ways of separating mixtures

Answer 5

Filtration
Evaporation
(Simple) distillation

Question 6

What is filtration good for

Answer 6

Separating insoluble solid forms liquid

Question 7

What is evaporation

Answer 7

The process of saturnine in a liquid knot a vapour

Question 8

What is evaporation used for

Answer 8

Separating soluble solid from a liquid

Question 9

What is distillation

Answer 9

Evaporation,, cooled, condensed

Question 10

What is distillation used for

Answer 10

Separating a liquid from a solution

Question 11

What is a base

Answer 11

Substance they reacts with acid to neutralise them

Question 12

Examples of bases

Answer 12

Metal oxides
Metal hydroxides
Metal carbonates

Question 13

What does insoluble mean

Answer 13

They don’t dissolve in water

Question 14

If a base doesn’t dissolve in water, what is it called?

Answer 14

Alkali

Question 15

Example of base and Alkali

Answer 15

Sodium hydroxide

Question 16

What is MASH

Answer 16

Metal oxide + acid -> salt + water

Question 17

What is BASHO

Answer 17

Base + acid -> salt + water

NEUTRALISATION

Question 18

What is CASHOCO2

Answer 18

Metal carbonate + acid -> salt + water + carbon dioxide

Question 19

Acids name -> salts name

Answer 19

Hydrochloride acid - chloride
Suphuric acid - sulphate
Nitric acid - nitrate

Question 20

Properties of mega,s

Answer 20

Conduct heat

Conduct electricity

Question 21

Properties of non-metals

Answer 21

Low melting pint

Low density

Question 22

What does lattice mean

Answer 22

Regular arrangement of atoms

Question 23

What dies ductile mean

Answer 23

Pure metals in lattice shape NOT AS STRONG

Question 24

what does alloy mean

Answer 24

Differe t metals in nom-lattice shape STRONGER

Question 25

Crystilation def

Answer 25

Solution warmed solvent evaporated

Question 26

Chromatography def

Answer 26

Separate mixtures of soluble substances

Question 27

Element =

Answer 27

1 atom

Question 28

Compound =

Answer 28

2+ atoms

Question 29

Mixture =

Answer 29

2+ different substances that aren’t joined together

Question 30

1803

Answer 30

Atoms

Question 31

1897

Answer 31

Electrons

Question 32

1909

Answer 32

Atoms have a nucleus with electrons around it

Question 33

1913

Answer 33

Electrons occupy shells

Question 34

1918

Answer 34

Protons

Question 35

1932

Answer 35

Neutrons

Question 36

Protons =

Answer 36

Electrons

Question 37

Neutral

Answer 37

Neutrons

Question 38

+

Answer 38

Protons

Question 39

-

Answer 39

Electrons

Question 40

Number of protons and electrons =

Answer 40

Atomic number

Question 41

Number of neutrons =

Answer 41

Mass number - atomic number

Question 42

Top number =

Answer 42

Mass number

Question 43

Bottom number =

Answer 43

Atomic number