Phosphorus!!!! Hope this helps
When a neutral hydrogen atom loses an electron, a positively-charged particle should remain.
Answer:

Explanation:
The molecular formula of the monohydrate formed = 
The molecular mass of the monohydrate formed = 
So, Mass = 24 + 14 + 6 × 1 + 5 × 16 = 155 g
Mass of phosphorus = 31 g
Thus,

Hi the answer is actually B
The answer to your question is green