鈹粉用來制造核反應堆中的熱交換器。鈹還用做原子反應堆中的中子減速劑和反射層。高純度鈹是快中子的重要來源。鈹透X射線，有金屬玻璃之稱。用來制造X光管的窗口。鈹主要用來制合金如的鈹青銅，制(zhi)造(zao)不發(fa)火工具(ju)的(de)銅(tong)鈹鎳合金(jin)，以及用(yong)于制(zhi)造(zao)飛機用(yong)的(de)含鈹合金(jin)。

物質屬性：

鈹(pi)(pi)(pi)元素符號Be，原子(zi)(zi)(zi)(zi)序數4，原子(zi)(zi)(zi)(zi)量9.012，核外(wai)電(dian)(dian)(dian)子(zi)(zi)(zi)(zi)排布(bu)1s22s2，位于(yu)(yu)第(di)(di)2周(zhou)期(qi)第(di)(di)ⅡA族，原子(zi)(zi)(zi)(zi)半徑(jing)111.3皮(pi)(pi)米(mi)，離子(zi)(zi)(zi)(zi)半徑(jing)35皮(pi)(pi)米(mi)，電(dian)(dian)(dian)離能905kJ/mol，電(dian)(dian)(dian)負性(xing)1.5。鋼灰色(se)金屬，質堅(jian)硬(ying)，電(dian)(dian)(dian)導性(xing)5.2，氧化(hua)(hua)(hua)數+2。在空氣(qi)(qi)容(rong)易(yi)形成(cheng)致密氧化(hua)(hua)(hua)膜保護層(ceng)，故在空氣(qi)(qi)中加熱(re)到赤(chi)紅(hong)時(shi)也(ye)很(hen)穩定。鈹(pi)(pi)(pi)有劇毒(du)。不溶(rong)(rong)于(yu)(yu)冷水(shui)(shui)，微(wei)溶(rong)(rong)于(yu)(yu)熱(re)水(shui)(shui)，生(sheng)(sheng)成(cheng)氫(qing)(qing)(qing)氧化(hua)(hua)(hua)鈹(pi)(pi)(pi)和(he)氫(qing)(qing)(qing)氣(qi)(qi)，灼熱(re)的鈹(pi)(pi)(pi)跟水(shui)(shui)蒸氣(qi)(qi)反(fan)應生(sheng)(sheng)成(cheng)氧化(hua)(hua)(hua)鈹(pi)(pi)(pi)和(he)氫(qing)(qing)(qing)氣(qi)(qi)。可以跟鹵素化(hua)(hua)(hua)合生(sheng)(sheng)成(cheng)鹵化(hua)(hua)(hua)物。可溶(rong)(rong)于(yu)(yu)稀鹽酸(suan)，稀硫酸(suan)和(he)氫(qing)(qing)(qing)氧化(hua)(hua)(hua)鉀(jia)溶(rong)(rong)液(ye)并放出氫(qing)(qing)(qing)氣(qi)(qi)。氫(qing)(qing)(qing)氧化(hua)(hua)(hua)鈹(pi)(pi)(pi)是兩(liang)性(xing)氫(qing)(qing)(qing)氧化(hua)(hua)(hua)物，溶(rong)(rong)于(yu)(yu)氫(qing)(qing)(qing)氧化(hua)(hua)(hua)鈉(na)溶(rong)(rong)液(ye)生(sheng)(sheng)成(cheng)鈹(pi)(pi)(pi)酸(suan)鈉(na)Na2BeO2。鈹(pi)(pi)(pi)鹽多有甜味(wei)，有毒(du)。鈹(pi)(pi)(pi)對鈉(na)及液(ye)態鈉(na)鉀(jia)合金有性(xing)。

密度為：1.848

熔(rong)點(dian)：1278±5℃

沸點：2970℃，

自燃點：1198°F

電阻系數：4.46μΩ-cm,20°C