5. In a sample of pure copper, all atoms have atomic numbers which are
(1) the same and the atoms have the same number of electrons
(2) the same but the atoms have a different number of electrons
(3) different but the atoms have the same number of electrons
(4) different and the atoms have a different number of electrons

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.