According to the bohr model of an atom, what happens when an electron moves from the second energy level to the third energy level and then back to the second energy level? (a)
energy is absorbed and then stored in the atom. energy is released and then absorbed to form an absorption line. energy is absorbed and then released to form an emission line. energy is released from the atom, and the outer level is weakened.

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

How many atoms are there in 5.70 mol of mg

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?