a hydrogen atom usually consists of 1 proton and 1 electron. a helium atom usually contains 2 protons, 2 neutrons, and 2 electrons. compare the mass of 2 hydrogen atoms to the mass of 1 helium atom.

Select the correct answer. which phrase correctly describes temperature? o a. average rotational kinetic energy of the particles in an object o b. average energy of the particles in an object c. average translational kinetic energy of the particles in an object od. all energy possessed by the particles in an object

Explain that newton first law,second law and third law of motion?

What must occur for air masses to form fronts