An unbalanced equation is called _____ equation.

• A chemical equation that does not obey the law of conservation of mass and the law of constant proportions, i.e. do not have the same number of atoms of each element on the reactant side and the product side of the equation is known as an unbalanced chemical equation.
• It is also known as a skeletal equation.
• An example of a balanced chemical equation, $\underset{\mathrm{Magnesium}}{2\mathrm{Mg}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Magnesium}\mathrm{oxide}}{2\mathrm{MgO}\left(\mathrm{s}\right)}$.

Therefore, An unbalanced equation is called a skeletal equation.