homolytic cleavagehomolytic fissionhomomoleculehomonuclearhomonuclear diatomic moleculehomopolar bondhomopolyatomichomopolymerhoodhopperhose clamphost crystalhost guest chemistryhot atomhot platehot strengthhshubble effecthuehumidificationhumidityhund ruleshyacinthhybridhybrid orbitalhybridizationhydratehydrated ionhydrateshydrationhydration energyhydration numberhydration of alkenshydride shifthydroborationhydrochinonehydrochlorinationhydrocrackinghydrodesulfurizinghydrodimerizationhydrodisulfidehydroforminghydroformylationhydrogenhydrogen bondhydrogen depleted structurehydrogen flame detectorhydrogen ionhydrogen like atomhydrogen like orbital