Kwi-periodic table, singazoba umgca we-zigzag osuka kwi-element eyi-boron (uphawu lwayo ngu-B) ukuya kwi-element eyi-polonium (uphawu lwayo ngu-Po). Ii-elements ekunqumla kuzo lo mgca zii-metalloids. Ii-elements ezihamba ngaphezulu nangasekunene kwalo mgca zii- nonmetals. Zonke ke ezinye ezi ii-elements zizii-metals.