How is the periodic table of elements organized?

by chemical characteristics.
by number of electron shells.
by number of protons.
by number of neutrons.

Name two kinds of practical electric pumps.

He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is

Can you receive a shock severe enough to prevent you from releasing the wire from an ordinary outlet with dry hands? a. no b. yes explain