+8 = 16 

ㄋㄞˋnài

ㄋㄚˊ
  1. 金屬元素符號Np,原子序93。銀白放射性同位素

neptunium (chemistry)​ (Tw)​
Neptunium
Neptunium (Element 93, Np)​ (S, Chem)​