metals

Question 1

name general physical properties of metals

Answer 1

malleable
ductile
sonorous
conduct electricity
conduct heat
solids at r.t.p (except Hg)
shiny

Question 2

name general chemical properties of metals

Answer 2

form basic oxides
form cations (+ve ions)

Question 3

describe the trend down g1 (alkali metals)

Answer 3

1. reactivity inc
2. density inc
3. mp & bp dec
4. softness inc

Question 4

describe the physical properties of alkali metals

Answer 4

soft
low mp
low bp
low density

Question 5

describe the chemical properties of alkali metals

Answer 5

+ve valency
form white compounds
react with oxygen to form basic oxides
most reactive
react with cold water

Question 6

describe the observation of an alkali metal reacting with cold water

Answer 6

floats, melts, darts

Question 7

name 4 chemical reactions of alkali metals

Answer 7

1. displacement
2. react with oxygen (form basic oxides)
3. react with cold water (metal hydroxide + hydrogen)
4. non metals (ions)

Question 8

describe the physical properties of alkaline earth metals (g2)

Answer 8

harder than alkali metals
denser than alkali metals
higher mp and bp than g1
better conductivity then g1

Question 9

describe the chemical properties of alkaline earth metals

Answer 9

less reactive than g1
form 2+ve cations
form white compounds
react with oxygen to form basic oxides
react with cold water

Question 10

describe the observation of alkaline earth metals reacting with cold water

Answer 10

sinks, effervescence, turbidity

Question 11

name 4 chemical reactions alkaline earth metals take part in

Answer 11

1. displacement
2. reaction with cold water (metal hydroxide + hydrogen)
3. non metals (ions)
4. with oxygen (metal oxides)

Question 12

magnesium has to be in which form to react with cold water?

Answer 12

powder form/powdered

Question 13

describe the physical properties of transition metals

Answer 13

best elec. and thermal conductors
highest density
hard and strong
highest mp and bp

Question 14

describe the chemical properties of transition metals

Answer 14

more than one valency
form coloured compounds
lowest reactivity
act as catalysts

Question 15

copper is ___ in colour

Answer 15

reddish-brown

Question 16

gold is ___ in colour

Answer 16

yellow

Question 17

in the reactivity series, which metals can react with acids?

Answer 17

metals above hydrogen

Question 18

list the elements of the reactivity series in order

Answer 18

K, Na, Ca, Mg, Al (C) Zn, Fe, Sn, Pb (H) Cu, Ag, Au, Pt

Question 19

list the metals that can react with cold water

Answer 19

K, Na, Ca, Mg

Question 20

metals react with cold water to form …

Answer 20

metal hydroxide + hydrogen

Question 21

list the metals that can react with steam

Answer 21

Al, Zn, Fe, Sn, Pb

Question 22

metals react with steam to form

Answer 22

metal oxides + hydrogen

Question 23

in the reactivity series, inert metals are…

Answer 23

Cu, Ag, Au, Pt

Question 24

which metals can be reduced by carbon?

Answer 24

metals below carbon in the reactivity series

Question 25

what term is given to the oxidation of iron or steel?

Answer 25

rusting

Question 26

the term for oxidation of metals/alloys other than iron and steel is…

Answer 26

corrosion

Question 27

name 6 ways to prevent rusting

Answer 27

1. galvanizing (coating with zinc)
2. painting
3. oiling/greasing
4. sacrificial protection
5. plastic coating
6. electroplating