Question

| Atomic symbol | Atomic Number | Protons | Neutrons | Electrons | Atomic mass |
|---------------|---------------|---------|----------|-----------|-------------|
| ___ | 11 | __ | __ | __ | 24 |

Answer 1

To fill in the missing information for the atomic symbol, protons, neutrons, electrons, and atomic mass, let's analyze the given atomic number (11) and atomic mass (24).

1. **Atomic Symbol**: The atomic number 11 corresponds to Sodium (Na).
2. **Protons**: The number of protons is equal to the atomic number, which is 11.
3. **Neutrons**: To find the number of neutrons, we can use the formula:
\[
\text{Neutrons} = \text{Atomic Mass} - \text{Protons}
\]
So,
\[
\text{Neutrons} = 24 - 11 = 13
\]
4. **Electrons**: In a neutral atom, the number of electrons is equal to the number of protons, which is 11.

Now, filling in the table:

| Atomic symbol | Atomic Number | Protons | Neutrons | Electrons | Atomic mass |
|---------------|---------------|---------|----------|-----------|-------------|
| Na | 11 | 11 | 13 | 11 | 24 |