Choose all the answers that apply magnesium (mg) has 12 protons and 12 neutrons. magnesium has - an atomic number of 24 - an atomic mass of 24 - 12 electrons - 5 electron shells - an atomic weight of 12 select all that apply

Fission of uranium-235 products energy and a. isotopes of smaller elements b. isotopes of larger elements c. lighter isotopes of uranium d. heavier isotopes of uranium

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.

How much energy is made when a pice of wood burns. how do you know