CHEM 1301 Chapter Notes - Chapter 7.7: Antibonding Molecular Orbital, Boron, Problem Solving

• School: University of Manitoba
• Department: Chemistry
• Course: CHEM 1301
• Professor: Sarrah Vakili

Document Summary

Comparative properties of metals and nonmetals (self study) There are no distinct exceptions to the general properties of metal sand nonments. Some elements have intermediate properties and are classified as metalloids (semimetals) The six elements generally recognized as metalloids are: boron, silicon, germanium, arsenic, antimony, tellurium. Metalloids are brittle and have intermediate to relatively good electrical conductivities. They have intermediate values of ionization energy and electronegativity and typically behave chemically as nonmetals. An extension of the delocalized orbital ideas. Band theory accounts for the properties of metals, and explains the properties of metalloids such as silicon. The bonding theory should explain how bonding occurs with so few valence electrons in metals. It should also account for some distinct properties of metals such as a shiny appearance, electrical conductivity and easiness of flattening into sheets and drawing into wires. Lithium has the same valence shell orbitals as flourine (2s, 2px, 2py and 2pz)