Let's solve this step by step based on the information provided in the image.
---
Key Concepts from the Image:
-
Atomic Number (top left):
- Represents the number of
protons and
electrons in a neutral atom.
-
Atomic Symbol:
- The chemical symbol for the element.
-
Atomic Mass (bottom):
- The total mass of the atom (approximately the sum of protons and neutrons).
-
Number of Neutrons = Atomic Mass − Atomic Number
---
Now, let’s fill in the table for each element.
---
1. He (Helium)
- Atomic Number: 2 → # protons = 2
- Atomic Mass: 4 → # neutrons = 4 − 2 =
2
- Element:
Helium
✔
- Element:
Helium
- # protons:
2
- # neutrons:
2
---
2. Fe (Iron)
- Atomic Number: 26 → # protons = 26
- Atomic Mass: 56 → # neutrons = 56 − 26 =
30
- Element:
Iron
✔
- Element:
Iron
- # protons:
26
- # neutrons:
30
---
3. Al (Aluminum)
- Atomic Number: 13 → # protons = 13
- Atomic Mass: 27 → # neutrons = 27 − 13 =
14
- Element:
Aluminum
✔
- Element:
Aluminum
- # protons:
13
- # neutrons:
14
---
4. Ca (Calcium)
- Atomic Number: 20 → # protons = 20
- Atomic Mass: 40 → # neutrons = 40 − 20 =
20
- Element:
Calcium
✔
- Element:
Calcium
- # protons:
20
- # neutrons:
20
---
5. Ne (Neon)
- Atomic Number: 10 → # protons = 10
- Atomic Mass: 20 → # neutrons = 20 − 10 =
10
- Element:
Neon
✔
- Element:
Neon
- # protons:
10
- # neutrons:
10
---
6. C (Carbon)
- Atomic Number: 6 → # protons = 6
- Atomic Mass: 12 → # neutrons = 12 − 6 =
6
- Element:
Carbon
✔
- Element:
Carbon
- # protons:
6
- # neutrons:
6
---
7. F (Fluorine)
- Atomic Number: 9 → # protons = 9
- Atomic Mass: 19 → # neutrons = 19 − 9 =
10
- Element:
Fluorine
✔
- Element:
Fluorine
- # protons:
9
- # neutrons:
10
---
8. Cl (Chlorine)
- Atomic Number: 17 → # protons = 17
- Atomic Mass: 35 → # neutrons = 35 − 17 =
18
- Element:
Chlorine
✔
- Element:
Chlorine
- # protons:
17
- # neutrons:
18
---
9. Na (Sodium)
- Atomic Number: 11 → # protons = 11
- Atomic Mass: 23 → # neutrons = 23 − 11 =
12
- Element:
Sodium
✔
- Element:
Sodium
- # protons:
11
- # neutrons:
12
---
✔ Final Answer Table:
| Element | # Protons | # Neutrons |
|--------|-----------|------------|
| He | 2 | 2 |
| Fe | 26 | 30 |
| Al | 13 | 14 |
| Ca | 20 | 20 |
| Ne | 10 | 10 |
| C | 6 | 6 |
| F | 9 | 10 |
| Cl | 17 | 18 |
| Na | 11 | 12 |
---
Summary:
To solve any similar problem:
1.
Atomic Number = # of protons
2.
# of neutrons = Atomic Mass − Atomic Number
3. Use the symbol to determine the
element name (you can refer to the periodic table).
Let me know if you'd like this formatted as a printable worksheet!
Parent Tip: Review the logic above to help your child master the concept of proton neutron electron worksheet.
