04a Bohr models lewis-dot-diagram ions Worksheet - Lewis Dot ... - Free Printable

Let’s go step by step to fill in the missing parts of the Lewis Dot Diagram Worksheet.

We are given data for three elements: Carbon, Hydrogen, and Lithium. For each, we need to find:
- Number of valence electrons (already mostly filled)
- Bohr Model (drawn or described — but since we can’t draw here, we’ll describe it clearly)
- Lewis Dot symbol (also partially filled)

But wait — looking at the table, some cells are already filled. Let’s check what’s missing.

Actually, re-reading the instructions: “Use the Bohr models to determine the number of valence electrons... place them around the element symbol.”

In the table, for Carbon:
- Atomic # = 6 → so 6 protons, 6 electrons
- Mass # = 12 → neutrons = 12 - 6 = 6 ✔️
- Valence electrons = 4 ✔️ (given as “4” in that cell)
- Bohr model is drawn with 2 electrons in first shell, 4 in second → correct for carbon
- Lewis dot: shown as ·C· with two dots on top and bottom? Actually, in the image it shows “·C·” which might be incomplete — standard Lewis dot for carbon has 4 dots, one on each side.

Wait — let’s look carefully at what’s actually missing in the table.

Looking again:

For Carbon:
- All numbers are filled: Atomic #6, Mass#12, Protons6, Neutrons6, Electrons6, Valence e⁻=4, Bohr model drawn, Lewis dot shown as “·C·” — but that only shows 2 dots? That’s not right. Standard Lewis dot for carbon should have 4 dots.

Actually, in the image, the Lewis dot for carbon is written as “·C·” — but that’s probably meant to represent 4 dots? Or maybe it’s a typo? Wait — no, in many worksheets, they write it like that meaning one dot on each side, but in text it’s hard to show.

But let’s focus on what’s truly missing.

Looking at Hydrogen:
- Atomic # = 1
- Mass # = 1
- Protons = 1
- Neutrons = 0
- Electrons = ? → should be 1 (since neutral atom)
- Valence electrons = ? → hydrogen has 1 valence electron
- Bohr model = ? → should show 1 electron in first shell
- Lewis dot = H → but should have one dot next to it, like H·

In the table, under “Electrons” for Hydrogen, it’s blank. Also “Valence electrons” is blank. Bohr model is blank. Lewis dot is just “H” — needs a dot.

Similarly, for Lithium:
- Atomic # = 3
- Mass # = 7
- Protons = 3
- Neutrons = ? → 7 - 3 = 4
- Electrons = 3
- Valence electrons = ? → lithium has 1 valence electron (group 1)
- Bohr model = ? → 2 in first shell, 1 in second
- Lewis dot = Li → should have one dot, like Li·

So let’s fill in the blanks systematically.

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Step 1: Hydrogen

- Atomic number = 1 → protons = 1
- In neutral atom, electrons = protons = 1
- Mass number = 1 → neutrons = mass # - atomic # = 1 - 1 = 0 ✔️ (already given)
- Valence electrons: hydrogen is in group 1, so 1 valence electron
- Bohr model: first shell holds max 2 electrons, but hydrogen has only 1 → so one electron in first shell
- Lewis dot: symbol H with one dot → usually written as H· (dot on any side)

So for Hydrogen row:
- Electrons: 1
- Valence electrons: 1
- Bohr model: circle with “1” inside (or description: 1 electron in first energy level)
- Lewis dot: H·

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Step 2: Lithium

- Atomic number = 3 → protons = 3
- Electrons = 3 (neutral atom)
- Mass number = 7 → neutrons = 7 - 3 = 4
- Valence electrons: lithium is in group 1 → 1 valence electron
- Bohr model: first shell: 2 electrons, second shell: 1 electron → total 3
- Lewis dot: Li with one dot → Li·

So for Lithium row:
- Neutrons: 4
- Valence electrons: 1
- Bohr model: two shells — inner with 2, outer with 1
- Lewis dot: Li·

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Now, double-checking Carbon:

- Given: atomic #6, mass#12, protons6, neutrons6, electrons6, valence e⁻=4
- Bohr model: shown with 2 in first, 4 in second → correct
- Lewis dot: should be C with 4 dots — one on each side (top, bottom, left, right). In the image it says “·C·” which might imply two dots, but probably it’s meant to be four. Since the instruction says “place them around”, we assume it’s correctly represented as having 4 dots.

But in the table, for Carbon’s Lewis dot, it’s written as “·C·” — which in plain text often means two dots, but in context, it’s likely intended to represent the full 4-dot structure. We won’t change it unless instructed.

Our task is to fill in the blanks — so for Hydrogen and Lithium, we add the missing values.

Also, note: in the Hydrogen row, “Electrons” and “Valence electrons” are blank — we fill those.

In Lithium row, “Neutrons” and “Valence electrons” are blank — we fill those.

Bohr models and Lewis dots for H and Li are also blank — we describe or indicate how to draw them.

Since this is a text-based response, I’ll write out what goes in each blank cell.

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Final filled table (only showing the missing parts):

Hydrogen Row:
- Electrons: 1
- Valence electrons: 1
- Bohr Model: Draw a circle (nucleus) with "1" inside, and one dot on the first ring (energy level) around it.
- Lewis Dot: H· (H with one dot beside it)

Lithium Row:
- Neutrons: 4
- Valence electrons: 1
- Bohr Model: Draw nucleus with "3", first ring with 2 dots, second ring with 1 dot.
- Lewis Dot: Li· (Li with one dot beside it)

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All calculations verified:
- Hydrogen: mass#1 - atomic#1 = 0 neutrons ✔️; electrons = atomic# = 1 ✔️; valence = 1 ✔️
- Lithium: mass#7 - atomic#3 = 4 neutrons ✔️; valence = 1 (group 1) ✔️
- Carbon: already complete and correct

Lewis dots:
- Hydrogen: 1 valence electron → one dot
- Lithium: 1 valence electron → one dot
- Carbon: 4 valence electrons → four dots (one per side)

Bohr models match electron configurations:
- H: 1e⁻ → 1 in first shell
- Li: 3e⁻ → 2 in first, 1 in second
- C: 6e⁻ → 2 in first, 4 in second

Everything checks out.

Final Answer:
For Hydrogen: Electrons = 1, Valence electrons = 1, Bohr Model = 1 electron in first shell, Lewis Dot = H·
For Lithium: Neutrons = 4, Valence electrons = 1, Bohr Model = 2 electrons in first shell, 1 in second, Lewis Dot = Li·