What is Hydride?
A '''hydride''' is a [[Compounds of oxygen|compound]] with [[Hydrogen bond|hydrogen bonded]] to other elements. Except for a few of the [[Noble gas]]es, all of the elements in the periodic table can form hydrides. The properties of hydrides can be very different, but some of the hydrides have similar properties.<ref>{{Cite journal|last=Chemistry (IUPAC)|first=The International Union of Pure and Applied|title=IUPAC - hydron (H02904)|url=https://goldbook.iupac.org/terms/view/H02904|access-date=2021-05-07|website=goldbook.iupac.org|doi=10.1351/goldbook.H02904}}</ref> ''Metallic hydrides'': compounds with [[ionic]] bonding. They are very reactive, making them difficult to [[Solvation|dissolve]]. Most [[alkali metal]]s and [[alkaline earth metal]]s form ionic hydrides. ''Metallic'' or ''Interstitial hydrides'': These have metallic properties like good [[electrical conductivity]] and [[thermal conductivity]]. They are called interstitial because hydrogen can enter the metallic lattice (framework of metal atoms). Metallic hydrides are mostly formed from the metals in the groups 3 to 5 of the [[periodic table]]. Some of these are used in the [[nickel metal-hydride battery]]. ''Covalent hydrides'': These have [[covalent]] bonds between hydrogen and the other element. Most of the [[p-block]] elements form covalent hydrides. Many of these hydrides are unstable in air or water or when heated. [[Hydrocarbon]]s are the hydrides of [[carbon]], [[ammonia]] is a hydride of [[nitrogen]], and [[water]] is a hydride of oxygen.<ref>{{Cite journal|last1=Jackson|first1=Peter F.|last2=Johnson|first2=Brian F. G.|last3=Lewis|first3=Jack|last4=Raithby|first4=Paul R.|last5=McPartlin|first5=Mary|last6=Nelson|first6=William J. H.|last7=Rouse|first7=Keith D.|last8=Allibon|first8=John|last9=Mason|first9=Sax A.|date=1980-01-01|title=Direct location of the interstitial hydride ligand in [HRu6(CO)18]– by both X-ray and neutron analyses of [Ph4As][HRu6(CO)18]|url=https://pubs.rsc.org/en/content/articlelanding/1980/c3/c39800000295|journal=Journa