Nucleic acid<span> typically contain phosphorous, and nitrogen plays an important structural role in nucleic acids and proteins. The proteins, being made up a diverse set of amino acids, have, in addition to carbon, hydrogen, oxygen, and nitrogen, the elements sulfur and selenium.</span>
The Americans colonies became free and independent states explanation: because they declared independence
Count the number of same elements before and after →
Make sure number of same elements on both sides are equal
2N on the right side, so it is 1N2
