Use an apostrophe + S ('s) to show that one person/thing owns or is a member of something. ...
Use an apostrophe after the "s" at the end of a plural noun to show possession. ...
If a plural noun doesn't end in "s," add an apostrophe + "s" to create the possessive form.
The connotation is that the pants did nothing to meet his expectation of what pants should do.
Knowing the formal charge on a particular atom in a structure is an important part of keeping track of the electrons and is important for establishing and predicting the reactivity. The formal charge on an atom in a molecule reflects the electron count associated with the atom compared to the isolated neutral atom.
