Lewis Dot Structures - Free Printable

Let’s go step by step to fill in the table for each element. We’ll use what we know about the periodic table and Lewis dot structures.

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Step 1: Understand the columns

- Element (Symbol): Already given — e.g., Ca for Calcium.
- Period Number: The row number on the periodic table where the element is found.
- Number of Energy Levels: Same as the period number! (Because each period = one more electron shell.)
- Group/Family Number: The column number (for main group elements, it’s 1–8 or sometimes labeled with A groups). This tells us how many valence electrons the atom has.
- # of Valence Electrons: For main group elements, this equals the group number (if using 1–8 system) or the last digit of the group number (if using 1–18 system). But here, since they show Families 1–8 on the right, we’ll match those.
- Draw a line to the right Lewis Dot Diagram: Match the number of dots around “E” to the number of valence electrons.

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Step 2: Go element by element

We’ll look up each element’s position on the periodic table.

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Calcium (Ca)
- Period: 4 → so energy levels = 4
- Group: 2 → Family 2 → valence electrons = 2
→ Draw line to Family 2 diagram (which shows 2 dots)

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Silicon (Si)
- Period: 3 → energy levels = 3
- Group: 14 → but in old numbering, that’s Group 4A → Family 4 → valence electrons = 4
→ Draw line to Family 4 diagram (4 dots)

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Hydrogen (H)
- Period: 1 → energy levels = 1
- Group: 1 → Family 1 → valence electrons = 1
→ Draw line to Family 1 diagram (1 dot)

*Note: Hydrogen is special — it only needs 2 electrons to be stable, but it still has 1 valence electron.*

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Aluminum (Al)
- Period: 3 → energy levels = 3
- Group: 13 → Group 3A → Family 3 → valence electrons = 3
→ Draw line to Family 3 diagram (3 dots)

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Oxygen (O)
- Period: 2 → energy levels = 2
- Group: 16 → Group 6A → Family 6 → valence electrons = 6
→ Draw line to Family 6 diagram (6 dots)

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Chlorine (Cl)
- Period: 3 → energy levels = 3
- Group: 17 → Group 7A → Family 7 → valence electrons = 7
→ Draw line to Family 7 diagram (7 dots)

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Neon (Ne)
- Period: 2 → energy levels = 2
- Group: 18 → Group 8A → Family 8 → valence electrons = 8
→ Draw line to Family 8 diagram (8 dots)

*Note: Neon is a noble gas — full outer shell!*

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Sodium (Na)
- Period: 3 → energy levels = 3
- Group: 1 → Family 1 → valence electrons = 1
→ Draw line to Family 1 diagram (1 dot)

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Bromine (Br)
- Period: 4 → energy levels = 4
- Group: 17 → Group 7A → Family 7 → valence electrons = 7
→ Draw line to Family 7 diagram (7 dots)

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Now let’s put all this into the table format:

| Element (Symbol) | Period Number | Number of Energy Levels | Group/Family Number | # of Valence Electrons | Draw a line to the right Lewis Dot Diagram |
|------------------|---------------|--------------------------|----------------------|-------------------------|---------------------------------------------|
| Calcium (Ca) | 4 | 4 | 2 | 2 | Family 2 |
| Silicon (Si) | 3 | 3 | 4 | 4 | Family 4 |
| Hydrogen (H) | 1 | 1 | 1 | 1 | Family 1 |
| Aluminum (Al) | 3 | 3 | 3 | 3 | Family 3 |
| Oxygen (O) | 2 | 2 | 6 | 6 | Family 6 |
| Chlorine (Cl) | 3 | 3 | 7 | 7 | Family 7 |
| Neon (Ne) | 2 | 2 | 8 | 8 | Family 8 |
| Sodium (Na) | 3 | 3 | 1 | 1 | Family 1 |
| Bromine (Br) | 4 | 4 | 7 | 7 | Family 7 |

✔ All values checked against standard periodic table positions and family groupings.

Final Answer:
The completed table is:

| Element (Symbol) | Period Number | Number of Energy Levels | Group/Family Number | # of Valence Electrons | Draw a line to the right Lewis Dot Diagram |
|------------------|---------------|--------------------------|----------------------|-------------------------|---------------------------------------------|
| Calcium (Ca) | 4 | 4 | 2 | 2 | Family 2 |
| Silicon (Si) | 3 | 3 | 4 | 4 | Family 4 |
| Hydrogen (H) | 1 | 1 | 1 | 1 | Family 1 |
| Aluminum (Al) | 3 | 3 | 3 | 3 | Family 3 |
| Oxygen (O) | 2 | 2 | 6 | 6 | Family 6 |
| Chlorine (Cl) | 3 | 3 | 7 | 7 | Family 7 |
| Neon (Ne) | 2 | 2 | 8 | 8 | Family 8 |
| Sodium (Na) | 3 | 3 | 1 | 1 | Family 1 |
| Bromine (Br) | 4 | 4 | 7 | 7 | Family 7 |