<span>3. relate to properties of elements and how they may react.
Periodic trends are specific patterns that are present in the periodic table that include size, electronic properties, melting point, electronegativity and metallic character. The trends exist due to the similar atomic structure of the elements within each group family.</span>
Example, when sulfur is burned in the air (one of my favorite chemical reactions) it combines with oxygen in the air to form an oxide. We consider this reaction in the form of a chemical equation: S (sulfur) + O2 (oxygen) |> SO2 (sulfur dioxide)
Through the vibration of particles in a medium.
the answer is d electronic balance
