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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.
Names and Formulas. of Compounds. Chapter 5. Chapter 5 2. Chemical Bond Concept. â¢ Recall that an atom has core and valence. electrons. â¢ Core electrons are found close to the nucleus. â¢ Valence electrons are found in the most distant. s and p (and d for transition metals) energy. subshells. â¢ The valence electrons are responsible for. holding two or more atoms together in a. chemical bond.