Th volume of helium in a blimp is 6.28x10^9 millimeters. thr density of helium is a blimp is 0.1786 meters. find the massof the helijm blimp

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 is the mass of 0.46 mil of mgcl2

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it