Question

given the following melting point data, are there any generalizations you can make about the melting points of metals versus nonmetals? write a brief explanation about the melting points of metals, nonmetals & metalloids.
aluminium 660 °c
carbon 3550 °c
copper 1063 °c
iodine 114 °c
magnesium 649 °c
silicon 1410 °c
sulfur 113 °c
zinc 420 °c

Explanation:

First, we classify the substances: Metals - Aluminum (660°C), Copper (1063°C), Magnesium (649°C), Zinc (420°C); Non - metals - Iodine (114°C), Sulfur (113°C); Metalloid - Silicon (1410°C); Carbon (3550°C, a non - metal with a very high melting point).

For most metals (Aluminum, Copper, Magnesium, Zinc), their melting points are relatively high (ranging from 420°C to 1063°C). Non - metals like Iodine and Sulfur have relatively low melting points (around 113 - 114°C). The metalloid Silicon has a high melting point (1410°C), and Carbon (a non - metal) also has an extremely high melting point (3550°C). So a general trend is that many metals tend to have higher melting points than typical non - metals, but there are exceptions like Carbon among non - metals and the metalloid Silicon also has a high melting point. This is related to the atomic structure and bonding in these substances. Metals have metallic bonding where positive metal ions are surrounded by a sea of delocalized electrons, which generally gives them relatively high melting points. Non - metals often have covalent or molecular bonding (like Iodine and Sulfur which are molecular), leading to lower melting points. However, Carbon (with covalent network bonding) and Silicon (also covalent network in the case of crystalline Silicon) have strong covalent bonds throughout the structure, resulting in very high melting points.

Answer:

A general trend is that many metals (e.g., Aluminum, Copper, Magnesium, Zinc) have relatively high melting points (420 - 1063°C) compared to typical non - metals (e.g., Iodine, Sulfur with 113 - 114°C). Exceptions exist: Carbon (non - metal) and Silicon (metalloid) have very high melting points (3550°C and 1410°C respectively) due to strong covalent network bonding, while most metals have metallic bonding and typical non - metals (like Iodine, Sulfur) have molecular bonding.