Chemistry 4

Question 1

Melting & boiling points of metals

Answer 1

High melting and boiling points, they are solids at room temperature

Question 2

Metals are…

Answer 2

Malleable, strong and flexible, ductile and shiny

Question 3

Metals are good conductors of…

Answer 3

Heat and electricity

Question 4

Exceptions of metals and why?

Answer 4

Graphite (form of carbon that conducts electricity) and Mercury (liquid at room temperature)

Question 5

Malleable

Answer 5

Can be hammered into different shapes

Question 6

Melting & boiling points of non-metals

Answer 6

Low melting and boiling points

Question 7

Non-metals are..

Answer 7

Brittle and not shiny

Question 8

Non-metals are poor conductors of…

Answer 8

Heat and electricity

Question 9

Brittle

Answer 9

When solid

Question 10

Oxidation

Answer 10

A chemical reaction that takes place when a substance comes into contact with oxygen or another oxidizing substance

Question 11

Combustion

Answer 11

A chemical process in which a substance reacts rapidly with oxygen and gives off heat

Question 12

If a metal is soluble…

Answer 12

It will most likely be basic

Question 13

Chemical property

Answer 13

How a substance reacts with other substances

Question 14

Physical property

Answer 14

A characteristic of a substance that can be observed or measured without changing the identity of the substance

Question 15

Catalyst

Answer 15

A substance that speeds up reactions without itself getting used up

Question 16

Catalyst converter

Answer 16

A device incorporated in a motor vehicle, containing a catalyst for converting pollutant gases into less harmful ones

Question 17

What metals are used in catalytic converters?

Answer 17

Platinum, Palladium and Rhodium

Question 18

Rusting

Answer 18

Corrosion of iron. Oxygen and water are needed

Question 19

What happens to iron if water and oxygen are present?

Answer 19

Rusts

Question 20

What happens to iron if water, oxygen and salt are present?

Answer 20

Rusts more then, when water and oxygen are present

Question 21

What happens to iron if boiled water and no oxygen are present with an oil layer?

Answer 21

Does not rust

Question 22

What happens to iron if dry air (oxygen) and calcium chloride are present?

Answer 22

Does not rust

Question 23

What stops corrosion of iron?

Answer 23

Painting, oil, powder and plastic

Question 24

Some metals react with cold water at what speed?

Answer 24

Very slow speed

Question 25

Group 1 and 2 i n the periodic table react...

Answer 25

Vigorously

Question 26

The lower you go down the periodic table the...

Answer 26

more reactive they become

Question 27

Most reactive metal

Answer 27

Potassium

Question 28

Least reactive metal

Answer 28

Gold

Question 29

Test for hydrogen

Answer 29

Place lit splint into the tube. If burns with squeaky pop hydrogen is present

Question 30

Some metals are unreactive with water but only reactive in the...

Answer 30

Form of steam

Question 31

What metals are reactive with steam?

Answer 31

Magnesium, iron and zinc

Question 32

Change variable

Answer 32

The thing you change

Question 33

Measure variable

Answer 33

The thing you measure

Question 34

Control variable

Answer 34

The thing that stays the same

Question 35

Good quality evidence needs to be...

Answer 35

Accurate and reliable

Question 36

Accuracy

Answer 36

How correct something is to its real value. Depends on the correct measuring device, calculation, controlling variables and the skill of the experiment.

Question 37

Reliability

Answer 37

How trustworthy something is. Repeating measurements allow you to be more certain about them.

Question 38

Best quality data will be...

Answer 38

Repeatable and reproducible, with a small range of values and few or no anomalous results.

Question 39

Data that is repeatable and reproducible is said to be...

Answer 39

Reliable

Question 40

Repeatable

Answer 40

Able to be done again. If the experiment repeats using the same method and equipment and gets the same results.

Question 41

Reproducible

Answer 41

Able to be reproduced or copied. If other people get similar or close results by using different equipment or method.

Question 42

What happens when metal reacts with acids?

Answer 42

The metal fizzes as effervescence occurs and the metal seems to disappear into the solution.

Question 43

Effervescence

Answer 43

Bubbles in a liquid

Question 44

How do you know chemical reaction is happening?

Answer 44

Colour change, effervescence, change of temperature, precipitation, odor.

Question 45

Alloy

Answer 45

When a metal has different materials added to it, or mixed with carbon

Question 46

Stainless steel is made by...

Answer 46

Melting iron and adding carbon, chromium and nickel.

Question 47

Stainless steel does not...

Answer 47

Rust

Question 48

Solder is made by...

Answer 48

Melting lead and adding tin.

Question 49

Solder melts at what temperature?

Answer 49

Lower temperatures than lead

Question 50

What is solder used for?

Answer 50

A 'glue' for electrical circuits.

Question 51

The atoms in a pure metal are...

Answer 51

Arranged in layers

Question 52

Adding an element with bigger atoms will...

Answer 52

Disrupt the packing of the metal atoms, making them harder to move and less malleable.

Question 53

The malleability of a metal is due to...

Answer 53

The layers sliding over one another.

Question 54

Boiling and melting points of pure metals are...

Answer 54

Fixed

Question 55

Boiling and melting points of alloys are...

Answer 55

Different or have a range depending on the composition of the alloy.