The electronic configuration of one of the coinage metals is

Options

A. 2, 8, 1
B. 2, 8, 18. 2
C. 2, 8, 18, 1
D. 2, 8, 18

Answer

To determine the electronic configuration of one of the coinage metals, we need to identify the coinage metals and their respective atomic numbers. The coinage metals include copper (Cu), silver (Ag), and gold (Au).

1. **Identify the Coinage Metals**:
- Copper (Cu) - Atomic number 29
- Silver (Ag) - Atomic number 47
- Gold (Au) - Atomic number 79

2. **Determine the Electronic Configuration**:
- The electronic configuration is determined by filling the electron shells according to the Aufbau principle.
- For Copper (Cu):
- K shell: 2 electrons
- L shell: 8 electrons
- M shell: 18 electrons
- N shell: 1 electron
- Therefore, the electronic configuration of Copper is: **2, 8, 18, 1**.

3. **Check Other Coinage Metals**:
- For Silver (Ag):
- K shell: 2 electrons
- L shell: 8 electrons
- M shell: 18 electrons
- N shell: 18 electrons
- O shell: 1 electron
- Electronic configuration: **2, 8, 18, 18, 1**.
- For Gold (Au):
- K shell: 2 electrons
- L shell: 8 electrons
- M shell: 18 electrons
- N shell: 32 electrons
- O shell: 18 electrons
- P shell: 1 electron
- Electronic configuration: **2, 8, 18, 32, 18, 1**.

4. **Identify the Correct Option**:
- Now, let's analyze the options provided:
- Option 1: 2, 8, 1 (Atomic number 11 - Sodium, not a coinage metal)
- Option 2: 2, 8, 18, 2 (Atomic number 30 - Zinc, not a coinage metal)
- Option 3: 2, 8, 18, 1 (Atomic number 29 - Copper, a coinage metal)
- Option 4: 2, 8, 18 (Atomic number 28 - Nickel, not a coinage metal)
- The correct answer is **Option 3: 2, 8, 18, 1**, which corresponds to Copper.