Final answer:
Without the molecule's structure, we cannot predict the number of unique resonance peaks in the 13C NMR spectrum. Nitrogen has two electron shells, and three nucleotides of RNA code for one amino acid. Further, valid spectroscopic notations adhere to quantum number rules.
Step-by-step explanation:
The student's question regarding the number of unique resonance peaks in the 13C NMR spectrum of a molecule cannot be answered without additional information about the structure of the molecule. Carbon-13 NMR spectroscopy is used to study the different carbon environments in a molecule, and each unique carbon environment corresponds to a distinct resonance peak.
Nitrogen typically has two electron shells, as it has an atomic number of seven which means it has seven electrons when neutral. These are arranged with two electrons in the first shell and five in the second.
For an RNA molecule, three letters, or nucleotides, are required to code for a single amino acid, which is known as a codon.
Regarding the peptide translated from the given mRNA sequence, the length would be four amino acids long since the sequence includes four codons before a stop codon would be encountered.
The mass of isotopes can be estimated as whole numbers by simply taking their mass numbers, such as phosphorus-31 having a mass of 31, carbon-14 having a mass of 14, and americium-241 having a mass of 241.
Carbon-12 is a stable isotope with six protons, six neutrons, and six electrons, giving it a mass number of 12 and a neutral net charge. This stability and mass are vital identification markers in spectroscopy and other scientific studies.
Allowed Spectroscopic Notations
1s¹
3p²
Each of these notations corresponds to a permissible arrangement of electrons in an atom, according to quantum numbers.