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2 3 is what i would put
Go to this website for any Periodic table help. It helped me so much!
https://www.chemicool.com/
Yes, the chemical reaction occurs because new substance is formed and heat energy is released.
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What is chemical reaction?</h3>
Chemical reaction is a process in which one or more substances i.e. the reactants, are converted to one or more different substances i.e. the products so we can conclude that the chemical reaction occurs because new substance is formed and heat energy is released.
Learn more about chemical reaction here: brainly.com/question/11231920
