How many hydrogen and nitrogen atom on the left side?(Reactants) 2Hydrogen atoms +2 Nitrogen atoms 3Hydrogen atoms +1 Nitrogen atom

To determine the number of hydrogen and nitrogen atoms on the left side (reactants), we need to analyze the given chemical equation: From the equation, we can see that there are 2 hydrogen atoms and 2 nitrogen atoms on the left side (reactants).Therefore, the number of hydrogen atoms on the left side is 2, and the number of nitrogen atoms on the left side is also 2.