Which of the following statements is true of nuclear fusion?

it involves the splitting of an atom's nucleus.
it is the process currently used in most nuclear power plants.
it is a very endothermic process.
it occurs with very small atoms with low mass.

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.