Melting Points of Titanium, Zinc, Uranium, and Rhodium

Titanium
- Titanium is a transition metal with the atomic number 22 and symbol Ti.
- It has a melting point of 1668°C (3034°F) or 1941 K.
- Titanium is known for its high strength, low density, and corrosion resistance.
- It is commonly used in aerospace and medical applications due to its desirable properties.

Zinc
- Zinc is a chemical element with the atomic number 30 and symbol Zn.
- It has a relatively low melting point of 419.5°C (787.1°F) or 692.6 K.
- Zinc is a bluish-white metal that is brittle at room temperature.
- It is commonly used as a protective coating for steel (galvanization) and in the production of alloys.

Uranium
- Uranium is a chemical element with the atomic number 92 and symbol U.
- It has a melting point of 1132.2°C (2070°F) or 1405.4 K.
- Uranium is a silvery-gray metal that is highly reactive and radioactive.
- It is primarily used as fuel in nuclear reactors and in the production of nuclear weapons.

Rhodium
- Rhodium is a chemical element with the atomic number 45 and symbol Rh.
- It has a high melting point of 1966°C (3569°F) or 2239 K.
- Rhodium is a rare, silvery-white metal that is resistant to corrosion.
- It is commonly used as a catalyst in various chemical reactions and in the production of electrical contacts.

Conclusion
Among the given options, zinc (option B) has the lowest melting point. Zinc melts at 419.5°C (787.1°F) or 692.6 K, which is significantly lower than the melting points of titanium, uranium, and rhodium. Zinc's relatively low melting point makes it suitable for various applications, including galvanization and alloy production.