Ba(ClO 4 ) 2 (aq)+K 2 SO 4 (aq) -> BaSO 4 (s)+2 KClO 4 (aq) Write the complete ionic equation

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.

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.