Which elements is named after the name of a planet is

Options

A. Hg
B. Po
C. Pu
D. Ra

Answer

### Step-by-Step Solution:

1. **Identify the Question**: The question asks which element is named after a planet.

2. **Recall Relevant Information**: There are several elements in the periodic table, but only a few are named after celestial bodies or planets.

3. **Identify the Element**: The element that is named after a planet is Plutonium. The name "Plutonium" is derived from "Pluto," which is the name of the dwarf planet in our solar system.

4. **Provide the Symbol**: The chemical symbol for Plutonium is "Pu".

5. **Mention the Atomic Number**: Plutonium has an atomic number of 94.

6. **Additional Information**: Plutonium is classified as an f-block element and is part of the actinide series. Its atomic mass is approximately 244 atomic mass units.

7. **Write the Electron Configuration**: The electron configuration for Plutonium can be expressed as [Rn] 5f^6, where Rn represents Radon, the preceding noble gas.

8. **Conclusion**: Therefore, the answer to the question is Plutonium (Pu), which is named after the planet Pluto.

### Final Answer:
The element named after a planet is **Plutonium (Pu)**.

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