What is released during the formation of a peptide bond?

What are the first three quantum numbers for the electrons located in subshell 2s?

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

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?