The electron affinity of an atom typically depends on the
a. mass of the atom's nucleus.
b. number of electrons already present in the atom.
c. number of neutrons in the nucleus of the atom.
d. availability of an unfilled orbital in the atom.

Based on its chemical properties, identify the position of each chemical family on the periodic table.

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

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?