The element found in both DNA and protein is nitrogen.
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Explanation:
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All the living things especially<u> 99%</u> of the human body is made up of six elements, which are carbon, nitrogen, oxygen, calcium, phosphorus, and hydrogen.
- In DNA, we have a phosphate group which allowing the nucleotide to be linked. Sugar-phosphate is the backbone of the nucleic acid. The nitrogenous bases are creating a genetic alphabet by contributing letters. The nucleic acids are composed of oxygen, nitrogen, carbon, phosphorus, and hydrogen.
- The proteins are made up of different kinds of amino acids. In addition, they have hydrogen, carbon, sulfur, oxygen, selenium, and nitrogen.
Rule 1. aufbau rule - energy levels filled so lowest energy level filled first.
Rule 2. pauli exclusion principle - maximum of 2 electrons may be placed in each energy level. Provided the spins of electrons are of opposite sign.
Rule 3. hunds rule - when energy levels are equal one electron is added to each energy level in turn with their spins unpaired until each energy level has one electron.