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.
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).
Yes! Its boiling point is 1330oC. All ionic compounds like potassium iodide have relatively high boiling points. To boil them, ionic bonds (the electrostatic attraction between oppositely charged ions) must be broken in order to separate the ions. These bonds are strong so lots of energy is required, hence high boiling points.
They Have a low boiling point
ionic
Because of its hydrogen bonding.
Diamond is pure carbon with a specific crystalline structure.
diamond n iodine have high melting points as they are both ionic compounds
The boiling point of metalloids is not so high.
high boiling point low melting point
Chromium has a high boiling point as opposed to nonmetals. Metals tend to have high boiling points.
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).
No, 68 is a low boiling point.
because it does not have a high boiling point.
Yes! Its boiling point is 1330oC. All ionic compounds like potassium iodide have relatively high boiling points. To boil them, ionic bonds (the electrostatic attraction between oppositely charged ions) must be broken in order to separate the ions. These bonds are strong so lots of energy is required, hence high boiling points.
It's likely but not definitive. Giant covalent substances like diamond also have high melting and boiling points. To be sure you would have to show that the melted or dissolved substance conducts electricity.
Boiling point is a property not a force; but a high boiling point indicate a strong intermolecular force.
The boiling point increase at high pressure.