The noble gas that is discovered in the chromosphere of the Sun is 

Options

A. a. Rn
B. b. He
C. c. Xe
D. d. Ne

Answer

To solve the question about the noble gas discovered in the chromosphere of the Sun, we can follow these steps:

### Step 1: Understand the context of the question
The question asks for a specific noble gas found in the chromosphere of the Sun. The chromosphere is a layer of the Sun's atmosphere located above the photosphere and below the corona.

**Hint:** Consider what elements are commonly associated with the Sun and its layers.

### Step 2: Recall the characteristics of noble gases
Noble gases are a group of elements in Group 18 of the periodic table, known for their lack of reactivity due to having a full valence shell. The noble gases include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).

**Hint:** Remember that helium is the lightest noble gas and is often found in astronomical contexts.

### Step 3: Identify the relevant noble gas
Among the noble gases, helium is known to be abundant in stars, including the Sun. The Sun primarily consists of hydrogen and helium, with helium being produced from the nuclear fusion of hydrogen.

**Hint:** Think about the processes occurring in stars and the elements they produce.

### Step 4: Confirm the presence of helium in the Sun
Scientific studies and observations have confirmed that helium is present in the Sun's chromosphere. It was first detected in the Sun's spectrum during a solar eclipse in the 19th century.

**Hint:** Consider how scientists identify elements in celestial bodies through spectroscopy.

### Step 5: Conclude with the answer
Based on the information gathered, the noble gas discovered in the chromosphere of the Sun is helium.

**Final Answer:** Helium (He)

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