Beryllium, numero ya atome 4, uburemere bwa atome 9.012182, nikintu cyoroshye cya alkaline yisi.Yavumbuwe mu 1798 n’umuhanga mu bya shimi w’Abafaransa Walkerland mu gihe cyo gusesengura imiti ya beryl na zeru.Mu 1828, umuhanga mu by'imiti w’Abadage Weiler hamwe n’umuhanga mu bya shimi w’Abafaransa Bixi bagabanije chloride ya beryllium yashongeshejwe hamwe n’icyuma cya potasiyumu kugira ngo babone beryllium yera.Izina ryicyongereza ryitiriwe Weller.Ibiri muri beryllium mubutaka bwisi ni 0.001%, naho imyunyu ngugu nyamukuru ni beryl, beryllium na chrysoberyl.Beriliyumu isanzwe ifite isotopi eshatu: beryllium-7, beryllium-8, na beryllium-10.

Beryllium ni icyuma kijimye;gushonga 1283 ° C, ingingo itetse 2970 ° C, ubucucike bwa 1,85 g / cm³, beryllium ion radius 0.31 angstroms, ntoya cyane kuruta ibindi byuma.

Imiterere yimiti ya beryllium irakora kandi irashobora gukora urwego rwinshi rwa oxyde ikingira.No mubushuhe butukura, beryllium ihagaze neza mukirere.Beryllium ntishobora kwifata na acide ya dilute gusa, ahubwo irashobora no gushonga muri alkali ikomeye, ikerekana amphoteric.Oxide na halide ya beryllium bifite imiterere igaragara ya covalent, ibice bya beryllium byangirika byoroshye mumazi, kandi beryllium irashobora kandi gukora polymers hamwe na covalent hamwe nubushyuhe bugaragara bwumuriro.

Ibyuma bya beryllium bikoreshwa cyane nka moderi ya neutron mumashanyarazi.Umuringa wa Beryllium ukoreshwa mu gukora ibikoresho bidatanga ibishashi, nkibice byingenzi byimuka bya moteri ya aero-moteri, ibikoresho bisobanutse neza, nibindi. Beryllium yahindutse ibikoresho byubaka indege na misile kubera uburemere bwabyo, modulus nyinshi ya elastique hamwe nubushyuhe bwiza.Ibikoresho bya Beryllium ni uburozi ku mubiri w'umuntu kandi ni kimwe mu byangiza inganda.