Answer
No, this set of values is impossible.
Work Step by Step
1. Is the atomic number equal to the number of protons?
- Yes, they are equal. (25)
2. Is the sum of the number of protons and neutrons equal to the mass number?
Sum: $25 + 29 = 54$
Mass number: 53
- No, they aren't equal ($54 \ne 53$).
- Therefore, this set of values isn't possible.
