ʻO ka metala calcium a i ʻole ka calcium metala he metala keʻokeʻo kālā.Hoʻohana nui ʻia ia e like me ka deoxidizing, decarburizing, a me ka desulfurizing agent i ke kila kila a me ka hana kila kūikawā.Hoʻohana ʻia ʻo ia ma ke ʻano he mea hoʻohaʻahaʻa i nā kaʻina hana metala honua maʻemaʻe kiʻekiʻe.
ʻO ka calcium he metala keʻokeʻo kālā, ʻoi aku ka paʻakikī a ʻoi aku ke kaumaha ma mua o ka lithium, sodium, a me ka potassium;hehee ia ma 815°C.ʻO nā waiwai kemika o ka calcium metala he ʻeleu loa.I ka lewa, e hoʻoheheʻe koke ʻia ka calcium, e uhi ana i kahi ʻāpana o ke kiʻi ʻoniʻoni.Ke hoʻomehana ʻia, ʻā ka calcium, e hoʻolei ana i kahi ʻulaʻula ʻulaʻula nani.He lohi ka hana o ka calcium a me ka wai anuanu, a e hana ʻia nā hopena kemika ikaika i loko o ka wai wela, e hoʻokuʻu ana i ka hydrogen (lithium, sodium, a me ka pālolo e loaʻa pū kekahi i nā hopena kemika ikaika i loko o ka wai anuanu).He maʻalahi hoʻi ka calcium e hui pū me ka halogen, sulfur, nitrogen a pēlā aku.