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Refractory metals have high melting points because they have strong electrostatic bonds. The refractory metals are niobium, molybdenum, tantalum, tungsten and rhenium which have melting points over 2750K. Melting occurs when the thermal vibrations of atoms overcomes the bonds holding the solid crystal together. Technically the amplitude of the vibration exceeds …
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This is a hard question to answer. I propose that ionic compounds (in general) have the higher melting points. Most metals have melting points that are accessible in a laboratory or at least in a forge or metal foundry. A few metals are even liquid at room temperature. Caesium is one; can you think of others? Both metals and ionic solids are non-molecular materials, that …
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Ionic compounds tend to be crystalline structures with high melting points that are water soluble. Covalent bonds are highly stable bonds with low melting points. Many covalent compounds are flexible or gaseous and are not water soluble. Metallic compounds contain freely floating electrons which allow them to conduct electricity and heat well.
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Determining the melting point of a compound is one way to test if the substance is pure, but it doesn't necessarily identify the compound. A pure substance generally has a melting point range of less than 2 °C. However, other compounds may also have melting points within 2 °C of your sample. One way to become more certain is to determine the mixed melting points …
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The melting and boiling points depend on the strength of the bonds, which in terms is directly related to the product of the charges and inversely related to the separation. (consider the Columb's law for calculating the strength of electrostatic interactions: F_Q=k*(q_1 * q_2)/r^2 where r is the distance between the two charges and k a ...
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Melting point for metals has to do with: How many electrons are "free" to move between metal atoms in the metallic crystal structure. How well they are delocalized throughout the metal atoms. The more half-filled orbitals a metal has, the more electrons it can contribute""^([1]) to the conduction band""^([2]), and thus, the more delocalized its ...
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The melting points of the Period 3 metals sodium and magnesium are shown below. What is the differences in the melting points of sodium and magnesium, using the model of metallic bonding? Chemistry Bonding Basics Metallic Bonding
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See this site. Looking at the table, possibly the elemental metal with highest melting point is "wolfram, W" "aka tungsten".
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Giant covalent substances tend to have the highest melting points. Best examples: diamond / graphite, both with melting points exceeding 3000 degrees Centigrade. Ionic solids also tend to have high melting points, often over 1000 degrees but they vary. Some are low enough to melt in the lab with a Bunsen burner: Lead bromide for example has a melting point of 383 deg C.
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Why do metals often have high boiling points? ... How does metallic bonding contribute to a metal s ...
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