I just don't know what to do. I had little trouble getting through the first two questions but now I'm stuck on C and D is likely the same but for a base instead of an acid.

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Which element would mostly likely have an electron affinity measuring closest to zero

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out