All of the following statements are true of nuclear fusion except... Select one:
a. Extremely high temperatures are needed to start the reaction.
b. Hydrogen, the reactant, is scarce.
c. Two light nuclei react to form a heavier nucleus.
d. The products of the process may be radioactive.

d) the products of the process may be radioactive

Explanation:

nuclear fusion begins with two light nuclei that are combined to form larger nuclei. fusion required extremely high temperatures to give hydrogen atoms enough energy to overcome repulsion between the protons. In fusion, the reactant of Hydrogen is scare because Hydrogen atoms combine to form Helium atoms, neutrons, and extreme amounts of energy.

As said, fusion created large amounts of energy and the fuel is found on Earth, fusion produces no radioactive waste since atoms are combining.

for instance, fusion occurs naturally in stars, such as the sun. the earth gets its heat source from nuclear fusion, therefore if fusion created radioactive waste, there would not be life on earth.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)