13. the behavior of metals

Question 1

physical properties of metals

Answer 1

stong
malleable
ductile
sonorous
good conductors
high melting boiling points
high density

Question 2

chemical properties of metals

Answer 2

react with dilute acids to form salts
react with oxygen to form oxides
form positive ions when they react so they form ionic compounds

Question 3

physical properties of non metals

Answer 3

low melting boiling points
brittle
insulators
dull
low density

Question 4

chemical physical properties of non metals

Answer 4

react with oxygen to form acidic oxides
react with metals to form ions with negative charge
react with other non metals to form covalent compounds

Question 5

13.2, 13.3 !!!!

Question 6

reactivity series

Answer 6

potassium K
sodium Na
calcium Ca
magnesium Mg
aluminum Al
carbon
zinc Zn
iron Fe
hydrogen
copper Cu
silver Ag
gold Au

Question 7

reactivity series points

Answer 7

1 a metal will react with a compound of a less reactive metal by pushing the less reactive metal out of the compound and taking its place
2 the more reactive a metal the more stable its compounds

Question 8

rusting

Answer 8

iron + oxygen + water –> hydrated iron (III) oxide
4Fe (s) + 302 (g) + 4h20 (l) –> 2Fe2O3.2H2O (s)

Question 9

ways to prevent rusting

Answer 9

1 cover iron or steel (paint,grease,plastic,another metal)
2 let another metal corrode instead = sacrificial protection

Question 10

sacrificial protection

Answer 10

using a more reactive metal to coat iron or steel so that it doesnt get oxidised (rusted)