What do 2 different neutral isotopes of the same element have in common?

Which of the following statements is true about planck’s law

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.