An electron jumps from energy level 1 to energy level 2 by absorbing a photon of energy 8 ev. what is the most likely energy of the photon that will be emitted by the electron when it moves back down to energy level 1?

Which of these describes how heat is transferred by convection* a. sunlight travels through space without the aid of fluids or solids. b. warm air rises and takes the heat with it, eventually, it cools and sinks c. air at the equator rises and sinks at the poles. d. air molecules touch the warm ground, heating them up *not conduction

For either problem would be greatly appreciated

How many more valence electrons does sodium need to have a full outer valence shell