What are the oxidation numbers of the atoms in this reaction? Check all that apply.

CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)

-4 for C in CH4

+4 for C in CO2

-2 for O in all substances

+1 for H in both CH4 and H2O

+4 for O in H2O

A, B and D should be the ones you should check

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts