by radiation from the Earth's surface
Single type of atom builds a single atom
Answer:
Formula of the compound = 
Explanation:
Given,
No. of mole of O = 8.20 mol
No. of mole of P = 3.30 mol
Chemical formula = 
Ratio of P and O = 

formula of the compound = 
1: True
2: True
3: False
4: False
(Question 2 might not be true, not sure)