CHEM4

Question 1

Catalysts

Answer 1

substances that speed up chemical reactions

Question 2

Metal properties

Answer 2

Shiny, malleable, ductile, conductive, and sometimes magnetic

Question 3

Corrosion

Answer 3

the reaction with oxygen at the surface of a metal

Question 4

Rusting

Answer 4

The corrosion of iron

Question 5

Sodium + water ->

Answer 5

Sodium hydroxide + hydrogen

Question 6

Alkali metals

Answer 6

Group 1 elements, which are very reactive metals

Question 7

Metal + acid ->

Answer 7

salt + hydrogen

Question 8

Effervescence

Answer 8

Effervescence

the production of a gas from a reaction in a liquid

Question 9

Accuracy

Answer 9

how close a measurement is to the true value

Question 10

Repeating an experiment makes it more…

Answer 10

Reliable

Question 11

Anomalous result

Answer 11

A result that doesn’t fit in with the pattern of the other results in a set of data.

Question 12

Calcium + nitric acid ->

Answer 12

Calcium nitrate + hydrogen

Question 13

Lithium + hydrochloric acid ->

Answer 13

Lithium chloride + hyrdrogen

Question 14

Pure metal

Answer 14

A metal that does not contain any other materials

Question 15

Alloy

Answer 15

A metal with one or more elements added to improve it’s properties.

Question 16

Melting point

Answer 16

The temperature at which a solid becomes a liquid

Question 17

metal + oxygen ->

Answer 17

metal oxide

Question 18

what are the 3 reaction names when a metal combines with oxygen?

Answer 18

combustion, burning, oxidation

Question 19

If the metal oxide is soluble what will it most likely be?

Answer 19

basic

Question 20

Good conductors of heat

Answer 20

metal property

Question 21

Good conductors of electricity

Answer 21

metal property

Question 22

shiny

Answer 22

metal property

Question 23

ductile

Answer 23

metal property

Question 24

Malleable

Answer 24

metal property

Question 25

Strong and flexible

Answer 25

metal property

Question 26

solid with high melting points

Answer 26

metal property

Question 27

low melting points

Answer 27

non-metal property

Question 28

brittle (when solid)

Answer 28

non-metal property

Question 29

Not shiny

Answer 29

Non-metal property

Question 30

Poor conductors of heat

Answer 30

non-metal property

Question 31

Poor conductor of electritcy

Answer 31

non-metal property

Question 32

alkali metal + water ->

Answer 32

metal hydroxide + hydrogen

Question 33

oxide layer

Answer 33

prevents further corrosion of metal, meaning it can be used for doors and windows

Question 34

Conditions for rusting

Answer 34

water

Question 35

iron + oxygen + water ->

Answer 35

iron oxide

Question 36

metal + water ->

Answer 36

metal hydroxide + hydrogen

Question 37

Test for hydrogen gas?

Answer 37

squeaky pop test (splint in tube, if presnet burns with a pop)

Question 38

Reaction of metals in water from groups 1 and 2?

Answer 38

vigourous

Question 39

Top three most reactive metals

Answer 39

1. Potassium 2. Sodium 3. Lithium

Question 40

Top three least reactive metals

Answer 40

12. Gold 11. silver 10. copper

Question 41

Metals in-between Top three most and least reactive

Answer 41

4. Calcium 5. Magnesium 6. Alumninium 7. Zinc 8. Iron 9. Lead