When two nonmetals are the same like F2 the bond is lonic
Nonpolar Covalent
Polar Covalent

no but i do not usually comment or use my voice that much when it comes to social media

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.