Helium gives a characteristic spectrum with

Options

A. orange and red lines
B. orange lines
C. yellow line
D. green line

Answer

To solve the question "Helium gives a characteristic spectrum with:", we can follow these steps:

### Step 1: Understand the Concept of Characteristic Spectrum
- Every element emits light at specific wavelengths when its electrons transition between energy levels. This emission creates a unique pattern of lines known as a characteristic spectrum.

### Step 2: Identify the Element in Question
- The question specifically asks about helium, which is a noble gas in Group 18 of the periodic table.

### Step 3: Historical Context of Helium's Discovery
- Helium was first discovered in the spectrum of sunlight before it was found on Earth. The name "helium" is derived from "Helios," the Greek god of the sun.

### Step 4: Analyze the Options Given
- The options provided are: orange lines, red lines, yellow lines, or green lines. We need to determine which of these corresponds to helium's characteristic spectrum.

### Step 5: Recall the Characteristic Spectrum of Helium
- Helium is known to emit a characteristic spectrum that includes prominent yellow lines. This was observed during its discovery through spectroscopic analysis.

### Step 6: Conclude the Answer
- Based on the analysis, the correct answer is that helium gives a characteristic spectrum with **yellow lines**.

### Final Answer:
Helium gives a characteristic spectrum with **yellow lines**.

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