B 2
is which shell are the valence electrons of the elements in period 2 found
ANSWER
Power stroke
EXPLANATION
At the power stroke stage, the piston is forced to move down by the expanding gases as both intake valve and exhaust valve are closed.
A spark from the spark plug contributes to ignition of the compressed fuel air mixture to released energy to perform work.
B. A gram would have a lot more molecules of propane than a mole
The more UV rays reach the earth
