What does the lab say because then i can help :)
A special type of combination is combustion. One of the key reactants in a combustion reaction must always involve an oxygen. This is the defining characteristic of combustion. When a combustible matter is burned, it reacts with the oxygen in air in the presence of heat. Moreover, one of its end products must be water. Let's take glucose as our example of a hydrocarbon.
C6H12O6(s) + 6O2(g) -----> 6CO2 (g) + H2O(g)
Therefore, when a solid glucose interacts with oxygen gas, it yields carbon dioxide and water vapor.
Explanation:
There is a trend in the periodic table.
I.E increases up the group and across the period. So you know that metals have less I.E compared to non-metals.