Ammonia is a compound of Hydrogen and Nitrogen(NH3). It is normally found as a stinky, lighter than air, gas.
Therefore at 'room temperature' it melting point is approximately -77C, and its boiling point -33C. Its low density and atomic weight set its phase change points.
low melting point, it is a gas at room temperature....
Iodine, at p=p0,Boiling point 457.4 K,  184.3 °C(So I don't know if you'd call this high or low? compared with what?)However the difference with melting point of Iodine (386.85 K,  113.7 °C) is remarkably small (< 71oC) and the solid is quite vaporous far below its boiling point (Triple point 386.65K (113.5oC), 12.07 kPa, just below melting point).
Diamond is an allotrope of carbon where all the carbon atoms are tetrahedrally bonded with each other forming a three dimensional covalent network. Since the bonds are strong (covalent, network), diamond has a very high melting point and boiling point. Iodine does not have three dimensional network and hence has very low melting/ boiling point. It fact, it will sublime at room temperature.
Compounds bonded by covalent bonds do not necessarily have low melting points. Some have whereas some don't have.Some polymers and hydrocarbons have very high melting points. But it can be said that they don't have melting points as high as ionic compounds. It is so because ionic bonds are stronger than the covalent bonds.
They Have a low boiling point
high boiling point low melting point
helium
low melting point, it is a gas at room temperature....
IT has a low boiling point ha
Low melting and boiling point
Beryllium has a high melting point
Ammonia has a low boiling point, is cheap, largely available and energy efficient.
yes the melting point is 115 degrees and the boiling point is 444 degrees
The melting point of copper is 1084,62°C .
It is liquid because it has a low melting point and a low boiling point.
Non-metals have lower boiling points than metals. A link can be found below.
It has a melting point between 31 degrees Celsius and 80 degrees Celsius, depending on the materials used.