Question

question 12 of 20 :
select the best answer for the question.

1. when two atoms of different elements come in contact, heat is given off and light is produced. which of the following does this support?

a. daltons atomic theory
b. the law of definite proportions
c. the law of conservation of energy
d. the law of conservation of matter

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Explanation:

• Option A: Dalton's atomic theory focuses on atoms as building blocks, combining in ratios, not energy changes. Eliminate A.
• Option B: The law of definite proportions is about compound composition, not energy. Eliminate B.
• Option C: The law of conservation of energy states energy is conserved, transforming (e.g., chemical to heat/light here). This matches.
• Option D: The law of conservation of matter is about matter conservation, not energy transformation. Eliminate D.

Answer:

C. The law of conservation of energy