Which of the following indicates that a chemical change has happened during cooking? The food darkens.

Bubbles form in boiling water.

Energy is transferred from the stove to a pan.

Butter melts.

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periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.