Free Printable Atomic Structure Worksheets - Free Printable

Let's solve each part of the Element & Atomic Structure Worksheet step by step.

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Question 1: Identify the three subatomic particles

The image shows a simplified atomic model with:

- A central nucleus (with green and blue spheres)
- Yellow dots orbiting around it
- Black dots indicating electrons

We need to identify the three subatomic particles: proton, neutron, and electron.

#### Step-by-step identification:
- The yellow dots orbiting the nucleus are electrons.
- The blue spheres in the nucleus are protons (they carry positive charge).
- The green spheres in the nucleus are neutrons (no charge).

Now, fill in the table:

| Particle | Charge | Location |
|------------|------------|------------------------|
| Proton | +1 | Nucleus |
| Neutron | 0 (neutral)| Nucleus |
| Electron | -1 | Electron shell/orbit |

And label the diagram:
- Arrow pointing to yellow dot → Electron
- Arrow pointing to blue sphere → Proton
- Arrow pointing to green sphere → Neutron

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Question 2: Identify the three atoms from their atomic structures

We analyze each atomic structure based on number of protons (atomic number) and electrons.

#### Atom 1 (left):
- Nucleus has 6 black spheres (protons) and some white ones (neutrons)
- 6 electrons in shells (2 in first, 4 in second)
- Total protons = 6 → Carbon (C)

✔ Answer: Carbon

#### Atom 2 (middle):
- Nucleus has 2 protons (black), 1 neutron (white)
- 2 electrons in the first shell
- Atomic number = 2 → Helium (He)

✔ Answer: Helium

#### Atom 3 (right):
- Nucleus has 1 proton (black), no neutrons shown (but hydrogen often has none)
- 1 electron in the first shell
- Atomic number = 1 → Hydrogen (H)

✔ Answer: Hydrogen

So, labels are:
- Left: Carbon
- Middle: Helium
- Right: Hydrogen

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Question 3: Label the periodic table box for Copper

Given:

```
Copper
29
Cu
63.546
```

We need to match each part with its label:

- "Copper" → Atom name
- "29" → Atomic number
- "Cu" → Symbol
- "63.546" → Atomic mass

So, fill in the blanks:

- Arrow to "Copper" → Atom name
- Arrow to "29" → Atomic number
- Arrow to "Cu" → Symbol
- Arrow to "63.546" → Atomic mass

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✔ Final Answers:

#### Question 1: Table

| Particle | Charge | Location |
|------------|--------|----------------|
| Proton | +1 | Nucleus |
| Neutron | 0 | Nucleus |
| Electron | -1 | Electron shell |

Labels on diagram:
- Yellow dot → Electron
- Blue sphere → Proton
- Green sphere → Neutron

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#### Question 2: Identify atoms

- First atom → Carbon
- Second atom → Helium
- Third atom → Hydrogen

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#### Question 3: Label the copper box

- "Copper" → Atom name
- "29" → Atomic number
- "Cu" → Symbol
- "63.546" → Atomic mass

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Let me know if you'd like this as a printable answer sheet!