How did later chemists change Mendeleev’s periodic table? A. They included physical properties such as melting point and density.

B. They used atomic number instead of atomic mass to organize the elements.

C. They used atomic mass instead of atomic number to organize the elements.

D. They included chemical properties such as bonding power.

1) what is the power in horsepower of a 100 watt light bulb? what is the power in kilowatts of a 200 horsepower engine? 2) if a cars engine is providing 3000 n of force to keep the car moving at 5 m/s, what is the engine’s effective power? 3) how many gallons of water will be pumped from a well 30 feet deep by a 1/2 hp engine in 1 minute? (1 gallon weighs 8.34 pounds)