Electron Configurations: A boarding house model explains how electrons fill atomic orbitals, with rooms representing energy levels and boarders as electrons.

Let's solve the problem step by step using Model 1 – The Boarding House analogy, which is a visual representation of electron configurations in atoms.

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🔍 Understanding the Analogy:

The boarding house represents an atom. Each part of the house corresponds to a component of atomic structure:

- Rooms → Atomic orbitals (like s, p, etc.)
- Bunk beds → Individual orbitals that can hold electrons
- Boarders (black dots) → Electrons
- Manager’s Code → Electron configuration (e.g., 1s² 2s² 2p⁶)

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✔ Question 1: Match each symbol with its most likely meaning.

We are given three symbols and three definitions:

#### a. ●
This is a black dot, shown in the diagrams as being placed on the bunk beds.

→ This represents a person staying in the room — i.e., an electron.

So, ● = III. Boarder

✔ Answer: a → III

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#### b. ⬜ (a bunk bed)
In the diagram, this is a bunk bed with two levels (like a ladder). It appears in every room.

Each bunk bed can hold two boarders (electrons), just like each orbital holds up to 2 electrons.

So, this symbol represents a place where boarders (electrons) sleep → I. Bunk bed for boarders

✔ Answer: b → I

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#### c. `1s² 2s² 2p⁶ 3s¹`
This is written under the 7:00 pm diagram and is labeled "Manager’s Code."

It tells us:
- How many boarders are in each room (orbital)
- Which rooms are occupied

This is analogous to an electron configuration, which gives the "address" of electrons.

So, this is II. Manager’s code for the number of boarders in the house and their room assignments.

✔ Answer: c → II

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🟩 Final Answers:

| Letter | Symbol | Matched Meaning |
|--------|--------------------|------------------|
| a | ● | III. Boarder |
| b | ⬜ (bunk bed) | I. Bunk bed for boarders |
| c | `1s² 2s² 2p⁶ 3s¹` | II. Manager’s code for the number of boarders and their room assignments |

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✔ Summary:

> 1.
> - a. ● → III. Boarder
> - b. ⬜ → I. Bunk bed for boarders
> - c. `1s² 2s² 2p⁶ 3s¹` → II. Manager’s code...

This analogy helps visualize how electrons fill orbitals in order of increasing energy (from bottom to top), just like boarders filling rooms in the boarding house.

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