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Step 1:**Part A**
Step 2:
The symbol for the first row is $\boxed{\mathrm{Zn}^{+}}$.
The symbol for the first row can be filled in by identifying the element with 34 neutrons and a positive charge, which is Zinc with one less proton than neutrons.
Step 3:
The symbol for the second row is $\boxed{\mathrm{Fe}}$.
For the second row, we need to find the element with 26 protons (Z), 56 nucleons (A), and 23 neutrons. Since the number of protons equals the atomic number, we can look up the element with Z = 26, which is Iron.
Step 4:
The symbol for the third row is $\boxed{\mathrm{P}}$.
The third row requires finding the element with 15 protons, 15 electrons, and 16 neutrons. By looking up the atomic number Z = 15, we find that the element is Phosphorus.
Step 5:
The symbol for the fourth row is given as $\mathrm{O}^{2-}$, which is the Oxide ion.
Step 6:
The symbol for the last row is $\boxed{\mathrm{Na}^{+}}$.
For the last row, we need to find the element with 11 protons, 10 electrons, and 12 neutrons. Looking up the atomic number Z = 11, we find that the element is Sodium. **Part B**
Step 7:
So, Z = 34 - 1 = $\boxed{33}$.
For the first row, we need to find the atomic number Z for Zinc, which has one less proton than neutrons.
Step 8:
For the second row, we already know that Z = 26 for Iron.
Step 9:
For the third row, we need to find the atomic number Z for Phosphorus, which is Z = 15.
Step 10:
However, the given charge of $2-$ indicates that there are two more electrons than protons, so the atomic number should be adjusted to Z = 8 - 2 = $\boxed{6}$.
For the fourth row, the atomic number for Oxygen is Z = 8.
Step 11:
For the last row, we need to find the atomic number Z for Sodium, which is Z = 11. **Part C**
Step 12:
For the first row, we already know that A = 34 for Zinc.
Step 13:
For the second row, we need to find the mass number A for Iron, which is A = 26 (Z) + 56 (neutrons) = $\boxed{82}$.
Step 14:
For the third row, we need to find the mass number A for Phosphorus, which is A = 15 (Z) + 16 (neutrons) = $\boxed{31}$.
Step 15:
However, the given charge of $2-$ indicates that there are two more electrons than protons, so the mass number should be adjusted to A = 16 - 2 = $\boxed{14}$.
For the fourth row, the mass number for Oxygen is A = 16.
Step 16:
For the last row, we need to find the mass number A for Sodium, which is A = 11 (Z) + 12 (neutrons) = $\boxed{23}$.
**
Final Answer
| Symbol | Z | A | Number of Protons | Number of Electrons | Number of Neutrons | Charge | | --- | --- | --- | --- | --- | --- | --- | | $\mathrm{Zn}^{+}$ | 33 | 34 | 33 | 32 | 34 | $1 +$ | | $\mathrm{Fe}$ | 26 | 82 | 26 | 26 | 56 | | | $\mathrm{P}$ | 15 | 31 | 15 | 15 | 16 | | | $\mathrm{O}^{2 -}$ | 6 | 14 | 6 | 8 | 8 | $2 -$ | | $\mathrm{Na}^{+}$ | 11 | 23 | 11 | 10 | 12 | $1 +$ |
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