Element Combustion Flashcards
1
Q
Element + oxygen ->
A
Element + oxygen -> element oxide
2
Q
Metal + oxygen ->
A
Metal + oxygen -> metal oxide
3
Q
Non-metal + oxygen ->
A
Non-metal + oxygen -> non-metal dioxide
4
Q
What are observations of the combustion of magnesium?
A
Bright white light and white powder formed.
5
Q
What are observations of the combustion of sulphur?
A
Blue flame.
6
Q
What are observations of the combustion of hydrogen?
A
Squeaky pop.
7
Q
What happens when a metal oxide dissolves in water?
A
It forms an alkaline solution
8
Q
What happens when a non-metal oxide dissolves in water?
A
It forms an acidic solution
9
Q
How can you determine whether an unknown element was a metal or non-metal?
A
- Combust it with oxygen
- Dissolve the oxide formed
- Check the pH of the solution with an indicator
10
Q
What is the state of a metal oxide?
A
Solid
11
Q
What is the state of a non-metal oxide?
A
Gas
