<h1 id="chemical-reactions">Chemical Reactions<a aria-hidden="true" class="anchor-heading icon-link" href="#chemical-reactions"></a></h1>
<p>occur when substances react</p>
<ul>
<li>Bonds are broken</li>
<li>New substances found
Substances before the reacion are called reactants
substances after are called products
MgO2 -> MgO</li>
</ul>

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