2
lesson pretestMultiple Choice

Pretest

Question 2 • Physical Science

Which best describes what happens to the atoms in a chemical reaction?

Answer
A
they are rearranged
B
all of them remain unchanged
C
many of them disappear
D
all of them form stronger bonds

Explanation

In a chemical reaction, atoms from the starting substances are rearranged into new combinations, forming different substances. The atoms themselves are not created or destroyed, so they do not disappear; their bonds change rather than all becoming stronger.

AI-written and checked against the verified answer.

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