oxygen and silicon I believe
Lpg contains ethane,propane,and butane..hope it helps
Answer:It has the lowest effective nuclear charge of the four new elements.
There’s no pic for me to awnser your question
Answer: A comprehensive legal term for uniform standards ascribed to the quantity, capacity, volume, or dimensions of anything. Legislation that adopts and mandates the use of a uniform system of weights and measures is a valid exercise of Police Power, and such laws are constitutional.
Explanation: