reactivity of metals

Question 1

reactivity series

Answer 1

chart showing decreasing reactivity
more reactive metal is
-more vigorous reaction is
-looses electron easily

larger gap = better faster vigorous reaction

Question 2

metal + water

Answer 2

forms metal hydroxide
and hydrogen

observation:
floats 
fizzing
potassium = purple flame 
water turns from green to purple

Question 3

metals + acid

Answer 3

forms salt and hydrogen

observation:
bubbles

anything under hydrogen in reactivity series does not react

Question 4

series

Answer 4

potassium 
sodium 
lithium
calcium
magnesium 
aluminum
carbon 
zinc 
iron 
tin 
lead
hydrogen
copper
silver 
gold 
platinum

Question 5

oxidation

Answer 5

metals react with oxygen
metal oxide forms
metal gains oxygen
losing electrons

Question 6

reduction

Answer 6

loss of oxygen

gain of electrons

Question 7

combustion of magnesium

Answer 7

magnesium glows until reaction = done
oxygen reacts with magnesium = magnesium oxide
oxidation

Question 8

displacement

Answer 8

more reactive metal can displace less reactive metal from compound

eg magnesium + copper sulphate

observation :
magnesium coated with copper
blue colour of solution fades
copper sulphate replaces by colourless magnesium sulphate