reactions with oxygen

Question 1

how does magnesium burn?
state and equation.
Also describe the product

Answer 1

burns in oxygen
magnesium burns with a bright white flame
2Mg+O2 -> 2Mgo
(white solid, high melting point and ionic bonding)

Question 2

can magnesium react with oxygen without a flame

Answer 2

yes

Question 3

what does a magnesium ribbon have around it?
give an equation.
state how the issue is solved.

Answer 3

has a thin layer of oxide
2Mg+O2-> 2MgO
The ribbon has to be cleaned with an emery paper before doing rections with the ribbon

Question 4

metals react with cold water.
to form what and what is the trend as you go down the group.
also give examples by using equations.

Answer 4

it forms hydroxides
increasing vigour as you go down the group.
examples:
Ca+ 2H2O-> Ca(OH)2 + H2
Sr+ 2H2O-> Sr(OH)2 +H2
Ba+2H2O-> Ba(OH)2 +H2

Question 5

what happens to group two reactivity as you go down the group?

Answer 5

it increases