Elements - made up of Ex:

1 answer:

7 0

All elements are made up of atoms. ➢ Atoms are made up of protons, neutrons, and electrons. Two different kinds of atoms can combine to form a compound. A molecule is a combination of atoms that cannot be broken apart while still retaining the same properties as the larger substance that it is a part of.

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Explanation:

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The activation energy is the energy barrier that must be overcome before a reaction takes place.
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Source of energy brainly.com/question/2948717

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