+5 = 13 

ㄎㄚˇ

  1. (californium,Cf)​化學元素原子序98。元素全部同位素放射性 自行分裂產生中子中子礦物探勘醫藥應用

(chemistry)​ cadmium (old)​, (Tw)​ californium
Californium
Californium (Element 98, Cf)​ (S, Chem)​