Here's the completed worksheet with explanations for each section:
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Atoms are composed of 3 subatomic particles
| Subatomic Particle | Charge | Location |
|--------------------|--------------|------------------|
| Proton | +1 (positive)| Nucleus |
| Neutron | 0 (neutral) | Nucleus |
| Electron | -1 (negative)| Electron shells / orbitals outside nucleus |
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✔ Explanation:
> -
Protons carry a positive charge and are found in the nucleus.
> -
Neutrons have no charge (neutral) and also reside in the nucleus.
> -
Electrons carry a negative charge and orbit the nucleus in electron shells or orbitals.
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Draw in the charges of each subatomic particle in the diagrams below
#### Diagram 1 (Bohr model style):
-
Protons (red circles) → Label each with
“+”
-
Neutrons (black circles) → Label each with
“0” (or leave blank if neutral)
-
Electrons (cyan dots on shells) → Label each with
“–”
>
✔ Explanation:
> In this simplified atomic diagram, you’re showing the charge of each particle. The nucleus contains protons (+) and neutrons (0), while electrons (–) move around in shells.
#### Diagram 2 (Planetary/orbital model):
-
Nucleus (green/purple cluster) → Inside: label protons with
“+”, neutrons with
“0”
-
Orbiting electrons (black dots) → Label each with
“–”
>
✔ Explanation:
> This is a more modern representation where electrons are shown moving in elliptical paths (orbitals). Each electron still carries a negative charge.
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What is the electron cloud?
>
Answer:
> The
electron cloud is a region around the nucleus where electrons are most likely to be found. It represents the probability distribution of an electron’s location — not a fixed path, but a “cloud” of possible positions based on quantum mechanics.
>
✔ Explanation:
> Unlike older models that showed electrons in fixed orbits (like planets around the sun), the modern quantum model describes electrons as existing in “clouds” or orbitals where there’s a high probability of finding them. The cloud is denser where the probability is higher.
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🧪 Summary of Key Concepts:
- Atoms = nucleus (protons + neutrons) + electrons
- Protons = positive, Neutrons = neutral, Electrons = negative
- Electrons occupy space outside the nucleus in shells or orbitals
- The “electron cloud” is a probabilistic model — it shows where electrons are *likely* to be, not exactly where they are at all times
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✔ Your completed worksheet should now have:
- All charges filled in the table
- “+”, “0”, and “–” labels drawn on each particle in both diagrams
- A clear definition of “electron cloud”
Let me know if you’d like to visualize this with actual drawings or animations!
Parent Tip: Review the logic above to help your child master the concept of atomic diagrams worksheet.
