Question

What is the atomic number and mass number of an atom with 13 protons and 14 neutrons?
p +=
e -=
n 0 =
atomic number=
atomic mass=

Answer 1

To determine the atomic number and mass number of an atom with 13 protons and 14 neutrons, we can use the following definitions:

- **Atomic Number (Z)**: This is the number of protons in the nucleus of an atom. It defines the element.
- **Mass Number (A)**: This is the total number of protons and neutrons in the nucleus.

Given:
- Number of protons (p) = 13
- Number of neutrons (n) = 14

### Calculations:
1. **Atomic Number (Z)**:
\[
\text{Atomic Number} = \text{Number of Protons} = 13
\]

2. **Mass Number (A)**:
\[
\text{Mass Number} = \text{Number of Protons} + \text{Number of Neutrons} = 13 + 14 = 27
\]

### Summary:
- \( p += 13 \)
- \( e -= 13 \) (assuming the atom is neutral, the number of electrons equals the number of protons)
- \( n^0 = 14 \)
- **Atomic Number = 13**
- **Atomic Mass = 27**

Thus, the atomic number is 13 and the mass number is 27.