Chapter 7 Review (Nicholas Delor) (Common Anions (1- (Iodide (I-),…
Chapter 7 Review (Nicholas Delor)
Cations and Anions
Cations: A positively charged ion formed by the atom's loss of valence electrons.
Anions: Produced by the gain of negatively charged electrons by a neutral atom.
Hydrogen Carbonate (HCO3-)
Alloys are mixtures composed of two ore more elements, at least one of which is a metal. Alloys are important because their properties are often superior to those of their component elements.
Sterling silver (92.5% silver and 7.5% copper) is harder and more durable than pure silver but still soft enough to be made into jewelry and tableware.
Bronze is an alloy generally containing seven parts of copper to one part of tin. Bronze is harder than copper and more easily cast.
Nonferrous (non-iron) alloys, such as bronze, copper-nickel, and aluminum alloys, are commonly used to make coins.
Metallic Bonds and Properties
Metallic Bonds consist of the attraction of the free-floating valence electrons for the positively charged metal ions. These bonds are the forces of attraction that hold metals together.
Metals that are malleable can be hammered or forced into different shapes.
Metals that are ductile can be drawn into wires.