Phase Inspection. 1  Framing: proper technique, boring & notching, wood grade, defective or missing members. 2  Window and door installation and water proofing. 3  Exterior sheathing and vapor barrier is correctly installed. â 4 Plumbing and Electrical inside the walls with correct nail stop shield placement.
Hydrogen is the lightest of the elements and is the most abundant element in the universe. (Also reference http://www.ducksters.com/science/chemistry/hydrogen.php) earth's atmosphere
What is the most common gas in the Earth's atmosphere? The most common gas in the earth's atmosphere is in fact, nitrogen, with it making up 78% of the air you're breathing right now. However, oxygen does make up 21% of the air. Edit