The enthalpy of combustion for octane (C3H13()), a key component of gasoline, is –5074 kJ/mol. The reaction equation is: C3H18(1) + 12.502(g) → 8C02(g) + 9H2O(g).
What is the AHq for this reaction?

16CO2(g) + 18H2O(g) → 2C3H18(1) + 2502(g)
kJ

The answers are very vague but basically the nonmetal group would be anything but the middle —

So the nonmetals would be the first , second group and then the last group, second to last group, all the way until you see B for Boron. Anything in the middle of the periodic table is a metal. So I would say along the top but to note, there are particular elements in group that aren’t along the top of the periodic table that would be considered a nonmetal!

I hope this helps you and if you are still confused let me know! :)