Question

3) Which phrase best describes radioactive decay?

A. the triggering of one reaction by the products of another
B. the spontaneous emission of radiation
C. the joining of small nuclei into a larger nucleus
D. the splitting of a large nucleus into smaller nuclei

4) How is fusion different from a simple chemical reaction?
A. Energy is released in a fusion reaction, but it is absorbed in a chemical reaction.
B. The atoms are bound to each other by electrons in a fusion reaction.
C. Atoms come together in a chemical reaction, but they are split in a fusion reaction.
D. The nuclei combine in a fusion reaction.

Answer 1

Step-by-step explanation:

The correct answer is B. Radioactive decay is the spontaneous emission of radiation from the nucleus of an atom, typically due to an unstable arrangement of protons and neutrons.

The correct answer is D. Fusion is a nuclear reaction in which two atomic nuclei come together to form a single, heavier nucleus. In contrast, a simple chemical reaction involves the rearrangement of electrons between atoms or molecules, and does not involve changes to the atomic nuclei. Option A is also not true because energy is released in both fusion and chemical reactions. Option B is describing chemical bonding, which is not present in nuclear fusion reactions. Option C is describing nuclear fission, where a large nucleus is split into smaller ones, but not fusion.

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Answer 2

The correct answer is B. Radioactive decay is the spontaneous emission of radiation from the nucleus of an atom, typically due to an unstable arrangement of protons and neutrons.

The correct answer is D. Fusion is a nuclear reaction in which two atomic nuclei come together to form a single, heavier nucleus. In contrast, a simple chemical reaction involves the rearrangement of electrons between atoms or molecules, and does not involve changes to the atomic nuclei. Option A is also not true because energy is released in both fusion and chemical reactions. Option B is describing chemical bonding, which is not present in nuclear fusion reactions. Option C is describing nuclear fission, where a large nucleus is split into smaller ones, but not fusion.