I-Lanthanum, ingxenye 57 yethebula le-periodic. Ukuze kwenziwe ithebula le-periodic lezinto libukeke livumelana kakhudlwana, abantu bakhiphe izinhlobo ze-elementi ezingu-15, okuhlanganisa ne-lanthanum, inombolo yazo ye-Atomic inyuka ngokushintshana, futhi bayibeka ngokwehlukana ngaphansi kwethebula le-periodic. Izakhiwo zawo zamakhemikhali zi...
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