Fusion reactions occur between what kinds of elements?
a. two very large nuclei

b. two very large uranium isotopes

c. very fast moving electrons
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d. very fast moving neutrons

e. very small atoms

The answer is that fusion reactions occur between very small atoms. Fusion reactions are a kind of nuclear reaction where the nuclei of two atom fuse and form a different atom around one new nucleus, This is only feasible with small atoms. For example, fusion is the nuclear rection that occurs in the Sun, specially between two atoms of H which form one atom of He. This reaction releases a huge amount of energy (nuclear energy).

Fusion reactions are nuclear reactions where the nuclei of two atom fuse and form a different atom around one new nucleous, This is only possible with small atoms. For example, fusion is the nuclear rection where the Sun takes it energy from: two atoms of hydrogen form one atom of He releasing nuclear energy.. So, the answer is the option E. very small atoms.

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.