Comprehensive Periodic Table of the Elements with a data table for element properties.

Let's solve the problem step by step using the periodic table and the information provided in the table below it.

We are given a table with various elements, some of which have missing values for Element Name, Symbol, Atomic Number, Atomic Mass, Number of Protons, or Number of Electrons. Our goal is to fill in the missing values based on the periodic table.

---

🔍 Key Concepts:

- Atomic Number = Number of protons = Number of electrons (in neutral atoms)
- Atomic Mass ≈ Sum of protons + neutrons (given as bottom number in periodic table)
- Symbol is the chemical symbol of the element
- Element Name corresponds to the symbol

---

Now let’s go through each row one by one:

---

1. Hydrogen

- Already filled:
- Element Name: Hydrogen
- Symbol: H
- Atomic Number: 1
- Atomic Mass: 1.008
- Protons: 1
- Electrons: 1 ✔

---

2. Symbol: V, Atomic Mass: 50.942

- V is the symbol for Vanadium
- Atomic Number: 23 (from periodic table)
- So, protons = 23, electrons = 23
- Atomic mass ≈ 50.942 ✔

✔ Fill in:
- Element Name: Vanadium
- Atomic Number: 23
- Protons: 23
- Electrons: 23

---

3. Symbol: Ag, Atomic Number: 47

- Ag is Silver
- Atomic Number = 47 → so protons = 47, electrons = 47
- Atomic Mass: Look up Silver → 107.87 (but table shows 107.87? Wait, check periodic table)

Wait — in the periodic table shown:
- Silver (Ag) has atomic mass 107.8682, but we can round to 107.87

But the table says "Atomic Mass" is blank, so we need to fill it.

✔ Fill in:
- Element Name: Silver
- Atomic Mass: 107.87
- Protons: 47
- Electrons: 47

---

4. Symbol: Sn, Atomic Mass: 118.711

- Sn is Tin
- Atomic Number = 50
- So protons = 50, electrons = 50
- Atomic Mass: 118.711 ✔

✔ Fill in:
- Element Name: Tin
- Atomic Number: 50
- Protons: 50
- Electrons: 50

---

5. Element Name: Helium, Protons: 2

- Helium → Symbol: He
- Atomic Number = 2
- Atomic Mass: 4.003 (from periodic table)
- Electrons = 2

✔ Fill in:
- Symbol: He
- Atomic Number: 2
- Atomic Mass: 4.003
- Electrons: 2

---

6. Symbol: Ar, Protons: 18

- Ar is Argon
- Atomic Number = 18
- Atomic Mass: 39.948 ≈ 39.95
- Electrons = 18

✔ Fill in:
- Element Name: Argon
- Atomic Number: 18
- Atomic Mass: 39.95
- Electrons: 18

---

7. Atomic Number: 74, Protons: 74

- Atomic Number 74 → Tungsten (W)
- Symbol: W
- Atomic Mass: 183.84
- Electrons = 74

✔ Fill in:
- Element Name: Tungsten
- Symbol: W
- Atomic Mass: 183.84
- Electrons: 74

---

8. Element Name: Zirconium, Atomic Mass: 91.224

- Zirconium → Symbol: Zr
- Atomic Number: 40
- Protons = 40, electrons = 40

✔ Fill in:
- Symbol: Zr
- Atomic Number: 40
- Protons: 40
- Electrons: 40

---

9. Atomic Number: 13, Electrons: 13

- Atomic Number 13 → Aluminum (Al)
- Symbol: Al
- Atomic Mass: 26.98
- Protons = 13

✔ Fill in:
- Element Name: Aluminum
- Symbol: Al
- Atomic Mass: 26.98
- Protons: 13

---

10. Element Name: Xenon, Symbol: Xe, Atomic Mass: 131.294

- Xenon → Atomic Number: 54
- Protons = 54, electrons = 54

✔ Fill in:
- Atomic Number: 54
- Protons: 54
- Electrons: 54

---

11. Element Name: Iodine (I), Electrons: 53

- Iodine → Symbol: I
- Atomic Number: 53
- Protons = 53
- Atomic Mass: 126.90

✔ Fill in:
- Symbol: I
- Atomic Number: 53
- Atomic Mass: 126.90
- Protons: 53

---

12. Element Name: Oxygen, Atomic Mass: 15.999, Protons: 8

- Oxygen → Symbol: O
- Atomic Number: 8
- Electrons = 8

✔ Fill in:
- Symbol: O
- Atomic Number: 8
- Electrons: 8

---

13. Atomic Number: 26, Electrons: 26

- Atomic Number 26 → Iron (Fe)
- Symbol: Fe
- Atomic Mass: 55.845
- Protons = 26

✔ Fill in:
- Element Name: Iron
- Symbol: Fe
- Atomic Mass: 55.845
- Protons: 26

---

14. Symbol: K, Atomic Mass: 39.098

- K is Potassium
- Atomic Number: 19
- Protons = 19, electrons = 19

✔ Fill in:
- Element Name: Potassium
- Atomic Number: 19
- Protons: 19
- Electrons: 19

---

15. Element Name: Nickel, Atomic Number: 28, Electrons: 28

- Nickel → Symbol: Ni
- Atomic Mass: 58.69
- Protons = 28

✔ Fill in:
- Symbol: Ni
- Atomic Mass: 58.69
- Protons: 28

---

16. Atomic Number: 11, Atomic Mass: 22.990

- Atomic Number 11 → Sodium (Na)
- Symbol: Na
- Protons = 11, electrons = 11

✔ Fill in:
- Element Name: Sodium
- Symbol: Na
- Protons: 11
- Electrons: 11

---

17. Atomic Number: 32, Atomic Mass: 72.631

- Atomic Number 32 → Germanium (Ge)
- Symbol: Ge
- Protons = 32, electrons = 32

✔ Fill in:
- Element Name: Germanium
- Symbol: Ge
- Protons: 32
- Electrons: 32

---

18. Element Name: Calcium, Symbol: Ca, Electrons: 20

- Calcium → Atomic Number: 20
- Protons = 20
- Atomic Mass: 40.078

✔ Fill in:
- Atomic Number: 20
- Protons: 20
- Atomic Mass: 40.078

---

19. Atomic Number: 79, Atomic Mass: 196.967, Protons: 82?

Wait! Contradiction here.

- Atomic Number = 79 → should be Gold (Au)
- But Protons = 82? That’s wrong!

Wait — Protons = 82 is given, but Atomic Number = 79?

This is inconsistent.

Let’s double-check:
- If Atomic Number = 79, then protons = 79
- But table says Protons = 82 → this must be a mistake.

But wait — look at the table:

> 19 | ? | ? | 79 | 196.967 | 82 | ?

So it says:
- Atomic Number: 79
- Protons: 82 → ✘ Impossible!

Because Atomic Number = Number of Protons

So either:
- The Atomic Number is wrong, or
- The Protons are wrong

But Atomic Number 79 → Gold (Au) → Protons = 79

So likely Protons = 82 is a typo.

But wait — Atomic Number 82 is Lead (Pb)

And Row 20 says:
> 20 | Lead | Pb | ? | ? | 82 | ?

Ah! So Row 19 is Gold, Row 20 is Lead

But in Row 19:
- Atomic Number: 79 → Gold
- Protons: 82 → ✘ Incorrect

So likely, Protons = 79, not 82

So correction:
- Protons = 79
- Electrons = 79
- Element Name: Gold
- Symbol: Au
- Atomic Mass: 196.967 ✔

✔ Fill in:
- Element Name: Gold
- Symbol: Au
- Protons: 79
- Electrons: 79

---

20. Element Name: Lead, Symbol: Pb, Protons: 82

- Lead → Atomic Number: 82
- So Atomic Number = 82
- Atomic Mass: 207.2
- Electrons = 82

✔ Fill in:
- Atomic Number: 82
- Atomic Mass: 207.2
- Electrons: 82

---

## ✔ Final Completed Table:

| # | Element Name | Symbol | Atomic Number | Atomic Mass | Protons | Electrons |
|---|------------------|--------|---------------|-------------|---------|-----------|
| 1 | Hydrogen | H | 1 | 1.008 | 1 | 1 |
| 2 | Vanadium | V | 23 | 50.942 | 23 | 23 |
| 3 | Silver | Ag | 47 | 107.87 | 47 | 47 |
| 4 | Tin | Sn | 50 | 118.711 | 50 | 50 |
| 5 | Helium | He | 2 | 4.003 | 2 | 2 |
| 6 | Argon | Ar | 18 | 39.95 | 18 | 18 |
| 7 | Tungsten | W | 74 | 183.84 | 74 | 74 |
| 8 | Zirconium | Zr | 40 | 91.224 | 40 | 40 |
| 9 | Aluminum | Al | 13 | 26.98 | 13 | 13 |
|10 | Xenon | Xe | 54 | 131.294 | 54 | 54 |
|11 | Iodine | I | 53 | 126.90 | 53 | 53 |
|12 | Oxygen | O | 8 | 15.999 | 8 | 8 |
|13 | Iron | Fe | 26 | 55.845 | 26 | 26 |
|14 | Potassium | K | 19 | 39.098 | 19 | 19 |
|15 | Nickel | Ni | 28 | 58.69 | 28 | 28 |
|16 | Sodium | Na | 11 | 22.990 | 11 | 11 |
|17 | Germanium | Ge | 32 | 72.631 | 32 | 32 |
|18 | Calcium | Ca | 20 | 40.078 | 20 | 20 |
|19 | Gold | Au | 79 | 196.967 | 79 | 79 |
|20 | Lead | Pb | 82 | 207.2 | 82 | 82 |

---

🛠️ Summary of Corrections:

- Row 19: Protons = 79, not 82 (was incorrect)
- All other entries are consistent with the periodic table.

✔ All blanks filled correctly.

Let me know if you'd like this in a printable format!