Natural abundance of oxygen I think
Answer:
You are the Cobalt
Explanation:
The least massive metalloid in the fourth period is Germanium, and it have 32 protons. If you have 5 less protons: 32 - 5 = 27 protons. The element with 27 protons is Cobalt
Ethanol is: flammable, liquid at room temperature, the boiling point is 78.37 ° C.