IsAsumu
IsAsumu iyinhlwa yevanga enophawu As nenani lobuchwe elingama -33. IsAsumu sitholakala kwizimbiwa eziningi, ngokuvamile lihlanganiswe nesibabuli nezinkimbi, kodwa futhi njengomncwebe oyisisekelo ocwebileyo. IsAsumu siyinhlanganisela yenkimbithi (metalloid). Inama- allotropes ahlukahlukene, kodwa isimo esimpunga, esibukeka okwensimbi kuphela, esibalulekile embonini.