Question

what is the atomic mass number of this atom? * your answer! this is a required question

Explanation:

Step1: Recall atomic mass number formula

The atomic mass number (A) is the sum of protons (P) and neutrons (N) in an atom, i.e., $A = P+N$.

Step2: Substitute given values

Given $P = 33$ and $N=42$, then $A=33 + 42$.

Step3: Calculate result

$33+42=75$.

Answer:

75