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【单选题】
三硫化磷（P 4 S 3 ）是黄绿色针状晶体，易燃、有毒，分子结构之一如图所示，已知其燃烧热△H=-3677kJ/mol（磷元素被氧化为P 4 O 10 ），下列有关P 4 S 3 的说法中不正确的是（ ）A.
分子中每个原子最外层均达到8电子稳定结构
B.
P 4 S 3 中磷元素为+3价
C.
热化学方程式为P 4 S 3 （s）+8O 2 （g）=P 4 O 10 （s）+3SO 2 （g）；△H=-3677kJ/mol
D.
分子中存在极性键与非极性键
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