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,

A neutron is neutral and a proton is positive and a electron is negative
The answer is 4. Hope it helps!
Answer:
I think it’s chlorine (Cl)
Explanation:
I’m literally doing the same question right now