+4 = 9 

ˋè

  1. (astatine,At)​化學元素原子序85。全部同位素放射性鹵族元素α粒子撞擊性質揮發醫學實驗階段

astatine (chemistry)​ (Tw)​
Astate
Astat (Element 85, At)​ <Taiwan&gt (S, Chem)​