Which of the following best predicts the outcome of a fusion reaction involving isotopes of hydrogen?
Two hydrogen isotopes form bonds with each other, absorbing a large amount of energy.
The nuclei of the hydrogen isotopes join together to form a heavier element, and energy is released.
Isotopes of hydrogen absorb electrons, undergo an increase in energy level, and split into fragments.
The nuclei of the hydrogen isotopes split, resulting in smaller fragments and the release of a large amount of energy.