Covalent molecules which contain only bonds between elements of similar electronegativity. For example: Carbon and hydrogen. They must not contain polar bonds like Oxygen and hydrogen.
Type your answer here... Nonpolar molecules
Type your answer here... Nonpolar molecules
A solid with weak intermolecular forces, such as those found in nonpolar molecules or small molecules, is likely to have the lowest melting point. These weak intermolecular forces are easily overcome by increasing temperature, causing the solid to melt.
The lowest melting point is of course - 39 0C.
Helium with a melting point of -272.905
Nonpolar molecules generally have lower melting points than polar molecules due to weaker intermolecular forces, specifically London dispersion forces. These forces are relatively weak compared to hydrogen bonds or dipole-dipole interactions found in polar substances. However, the melting point of a substance also depends on its molecular weight and structure, so not all nonpolar molecules will have the lowest melting points. In summary, while many nonpolar molecules have low melting points, it is not a universal rule.
W on the periodic table. the element with the highest melting/boiling point is tungsten.
Helium has the lowest melting point of all the non-metals. It melts at a temperature of -272.2 degrees Celsius.
Molecules with the lowest melting points are typically small, nonpolar molecules. These include gases like noble gases (e.g., helium, neon) or simple hydrocarbons (e.g., methane, ethane) that exhibit weak van der Waals forces. The minimal intermolecular forces in these substances result in lower melting points compared to larger or polar molecules with stronger interactions.
Covalent molecules which contain only bonds between elements of similar electronegativity. For example: Carbon and hydrogen. They must not contain polar bonds like Oxygen and hydrogen.
The stronger the bonds between molecules; the higher the melting/boiling points. This makes sense if you think about it, melting/boiling is splitting up the molecules - the stronger they are bonded the more energy you will need
Iodine has the lowest melting point among iron, copper, carbon, sulfur, oxygen, nitrogen, and iodine. Iodine is a nonmetal with a melting point of 113.7 degrees Celsius.