Calcium and bromine have formed a bond. leading up to this, calcium gave up electrons. it was a(n)
a. negative ion
b. shared ion
c. positive ion
d. neutral atom

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.

Achemical reaction is done in the setup shown, resulting in a change of mass. what will happen if the same reaction is done in a sealed container that is placed on the electronic balance?

In an exothermic reaction, energy may be released to the surroundings in the form of question 4 options: heat light thermal all of the above