Which element is heaviest melting and boiling point metal ?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the element that has the highest melting and boiling points among metals in the periodic table.

2. **Identifying Candidate Elements**: To find the metal with the highest melting and boiling points, we can refer to the periodic table and look for metals known for their high melting and boiling points.

3. **Researching Melting and Boiling Points**: Among the metals, tungsten (W) is widely recognized for having the highest melting point, which is approximately 3422 °C (6192 °F), and a boiling point of about 5555 °C (10031 °F).

4. **Explaining the Properties of Tungsten**: The high melting and boiling points of tungsten can be attributed to its electronic configuration of [Xe] 6s² 4f¹⁴ 5d⁴. This configuration allows for a significant number of unpaired electrons, which leads to strong metallic bonding.

5. **Conclusion**: Therefore, the element with the highest melting and boiling points among metals is tungsten (W).

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