Chemistry Dictionary & Glossary: Terms Starting with V VACUUM ULTRAVIOLET (VUV)VALENCEVALENCE BOND THEORYVALENCE ELECTRONSVALENCE SHELL ELECTRON PAIR REPULSION THEORYVAN DER WAALS PICTURE OF CONDENSED MATTERVAN DER WAALS' EQUATIONVAPORVAPOR PRESSUREVECTORVELOCITY SELECTORVENTURI TUBEVISCOSITYVISIBLE SPECTRUMVOLTAGEVOLTAIC CELLSVOM