What element melts at 1455 and 730C and boils at 1499 and 730C?

The element that melts at 1455°C and boils at 1499°C is molybdenum. Molybdenum is a transition metal with a high melting point and is known for its strength and resistance to heat and corrosion. The temperatures you provided correspond to its melting and boiling points, which make it valuable in various industrial applications, particularly in steel production and other alloys.