Which of the following metals in pure form has the highest melting point?

Tungsten

The correct answer is option 2. Tungsten.

Tungsten has the highest melting point of any metal in its pure form. Here's a brief explanation:

1. Tungsten (W):  Tungsten is a transition metal with the chemical symbol W and atomic number 74. It is known for its exceptional physical properties, including a very high melting point. Tungsten has a melting point of approximately 3,422 degrees Celsius (6,192 degrees Fahrenheit). This high melting point makes it suitable for applications where extreme temperatures are encountered, such as in the production of high-temperature tools, electrical contacts, and components for various industrial processes.

Now, let's compare it to the other metals listed:

2. Copper (Cu):  Copper has a much lower melting point compared to tungsten. It melts at around 1,984 degrees Celsius (3,623 degrees Fahrenheit).

3. Gold (Au): Gold has a relatively low melting point compared to tungsten. It melts at approximately 1,064 degrees Celsius (1,947 degrees Fahrenheit).

4. Platinum (Pt): Platinum also has a lower melting point compared to tungsten. It melts at about 1,772 degrees Celsius (3,222 degrees Fahrenheit).

In summary, tungsten has the highest melting point among the metals listed, making it particularly useful for applications that involve high-temperature conditions.