I really need help on this one can y'all help me out?

What amino acid is coded for by this sequence after the mutation

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.

Based on their relative positions in the periodic table, which two elements would have the same number of valence electrons?