Which type of reaction does this diagram represent? a chain reaction that is caused by nuclear fission a chain reaction that is caused by nuclear fusion a decrease in energy that is caused by nuclear fission an increase in energy that is caused by nuclear fusion

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.