Question

6 multiple choice 2 points which is composed of matter? electricity an atom light heat 7 multiple choice 2 points an equation is shown below.
_{1}^{2} h+_{1}^{2} h \to _{2}^{4} he
which kind of reaction does the equation represent? alpha decay beta decay nuclear fission nuclear fusion 8 multiple choice 2 points a nuclear fission reaction and a nuclear fusion reaction are similar because both reactions form heavy nuclides from light nuclides form light nuclides from heavy nuclides release a large amount of energy absorb a large amount of energy

Explanation:

• Question 6: Matter is anything that has mass and takes up space. An atom is a basic unit of matter. Electricity is a form of energy, light is electromagnetic radiation (energy), and heat is also a form of energy.
• Question 7: Nuclear fusion is the process where two light nuclei combine to form a heavier nucleus. In the given equation \(_{1}^{2}\text{H}+_{1}^{2}\text{H}\to_{2}^{4}\text{He}\), two hydrogen - 2 nuclei combine to form a helium - 4 nucleus. Alpha decay is the emission of an alpha particle (\(_{2}^{4}\text{He}\)) from a heavy nucleus. Beta decay involves the emission of a beta particle (electron or positron). Nuclear fission is the splitting of a heavy nucleus into lighter nuclei.
• Question 8: Both nuclear fission and nuclear fusion reactions release a large amount of energy. Nuclear fusion forms heavy nuclides from light nuclides, while nuclear fission forms light nuclides from heavy nuclides. Neither of them absorb a large amount of energy in the context of their typical reactions (fusion requires some initial energy input but releases much more, fission releases energy).

Answer:

1. an atom
2. nuclear fusion
3. release a large amount of energy