intermolecular hydrogen bondintermolecular reactionintermolecular rearrangementinternal frictioninternal phaseinternational system of unitsinternuclear distanceinterplanar crystal spacinginterplanar spacinginterpolateinterpolationinterpolymerinterstitialinterstitial atominterstitial compoundinterstitial hydrideintramolecularintramolecular forceintramolecular hydrogen bondintramolecular rearrangementintrinsicintrinsic conductivityintrinsic propertiesintrinsic quantum numberintrinsic semiconductorintrinsic velocityinvariantinverse elementinverse functioninversioninversion centerinversion of configurationinversion temperatureinvert sugeriodimetryiodineiodine numberion acceleratorion atomosphereion beamion chamberion cloudion concentrationion densityion dipole interactionion exchangeion exchange chromatographyion exchange resinion exchangerion implantation