To fill in the missing values for the element with atomic number 29, which is Copper (Cu), we can use the following information:
- Atomic Number: 29 (already given)
- Protons: The atomic number also indicates the number of protons, which is also 29.
- Neutrons: The number of neutrons can be calculated using the formula: \[ \text{Neutrons} = \text{Atomic Mass} - \text{Protons} \] Given that it is typical to use the most common isotope of copper for calculations, the atomic mass of Copper is approximately 63.55. Therefore, for the isotope with 35 neutrons: \[ 29 + 35 = 64 \quad (\text{atomic mass}) \]
- Electrons: In a neutral atom, the number of electrons is equal to the number of protons, which is 29.
- Atomic Mass: For the isotope with 35 neutrons, the atomic mass is approximately 64.
Here's the completed information:
| Atomic symbol | Atomic Number | Protons | Neutrons | Electrons | Atomic mass | |---------------|---------------|---------|----------|-----------|-------------| | Cu | 29 | 29 | 35 | 29 | 64 |