Describe why most of the compounds formed by transition elements are coloured. Why does graphite conduct electricity but diamond does not, yet they are made up of carbon? Why do some metals conduct heat better than others? What causes their difference in ...
(Solid carbon, for example, can exist in very different phases that include graphite and diamond.) That's just what we need to make a CD-RW disc. Instead of having a layer of dye, a CD-RW has a layer of metallic alloy that can exist in two different solid forms and change back ...
Seemed like the examples of substances the average person might reasonably know the chemical formula for should include a mineral. Halite seems likely (though that name is probably less familiar than table salt). Diamond and graphite were the only other minerals that I could think of that many ...
Explain why graphite has a lower melting point than diamond even though both are carbon compounds. Describe the bonding in metals and discuss how this explains high electrical conductivity. Explain why some ionic compounds are soluble in water. ...
(a) Briefly cite the main differences between ionic, covalent, and metallic bonding. (b) State the Pauli exclusion principle. (c) Compute the percent ionic character of the interatomic bonds for the f Why is the melting point ...
Explain why diamond is an electrical insulator and graphite is an electrical conductor. Explain why copper possesses a high electrical conductivity. Why do metals conductivity rate reduces with increase in temperature? Why do metallic compounds conduct electricity as a solid? How do condu...
Why not silicon, which is also in the 4th group of the periodic table? Why can graphite conduct electricity? Distinguish between conductors and non-conductors. Clearly and concisely define the terms and provide examples of nonmetals. Explain the difference between an n-type ...