The elements having the maximum and minimum melting points among the members of group 13 are respectively

Options

A. B, TI
B. TI,B
C. B, Ga
D. Al,TI

Answer

To determine the elements with the maximum and minimum melting points among the members of Group 13, we can follow these steps:

### Step 1: Identify the Elements in Group 13
Group 13 of the periodic table includes the following elements:
- Boron (B)
- Aluminum (Al)
- Gallium (Ga)
- Indium (In)
- Thallium (Tl)

### Step 2: Analyze the Melting Points of Each Element
Next, we need to look at the melting points of these elements:
- Boron (B) has a high melting point of approximately 2075 °C.
- Aluminum (Al) has a melting point of about 660 °C.
- Gallium (Ga) has a melting point of approximately 29.76 °C (notably low).
- Indium (In) has a melting point of about 1566 °C.
- Thallium (Tl) has a melting point of around 304 °C.

### Step 3: Determine the Maximum and Minimum Melting Points
From the melting points listed:
- The element with the **maximum melting point** is **Boron (B)**.
- The element with the **minimum melting point** is **Gallium (Ga)**.

### Step 4: Conclusion
Thus, the elements having the maximum and minimum melting points among the members of Group 13 are:
- Maximum: Boron (B)
- Minimum: Gallium (Ga)

### Final Answer
The answer is Boron (B) and Gallium (Ga).

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