To fill in the missing information for the element with an atomic number of 43, we can identify it as Technetium (Tc). Here's the complete table with the missing values filled in:
| Atomic symbol | Atomic Number | Protons | Neutrons | Electrons | Atomic mass | |---------------|---------------|---------|----------|-----------|-------------| | Tc | 43 | 43 | 57 | 43 | 100 |
Explanation:
- The atomic number is 43 (which corresponds to Technetium).
- The number of protons in Technetium is equal to the atomic number, which is 43.
- The atomic mass is approximately 100, and the number of neutrons can be calculated as: \[ \text{Neutrons} = \text{Atomic mass} - \text{Protons} = 100 - 43 = 57 \]
- The number of electrons in a neutral atom is equal to the number of protons, which is also 43.