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The study of molecules by molecular physics and theoretical chemistry is largely based on quantum mechanics and is essential for the understanding of the chemical bond. The simplest of molecules is the hydrogen molecule-ion, H 2 + , and the simplest of all the chemical bonds is the one-electron bond.
Energy relationships between the electrons of the reacting atoms are: The outermost energy shell of an atom is known as its: A chemical bond formed by the transfer of one or more electrons from the outermost energy level (the valance shell) of one atom to that of the other is a(n): An ionic bond.