How many kL make up 2.7×10^12cL

Order the following from smallest to largest atom, electron, quark, proton, neutron, molecule, nucleus

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

What produces wave a)sound b) heats c)transfer of energy d)vibrations