CHEM 103 Chapter Notes - Chapter 1: Dmitri Mendeleev, Lanthanide, Nuclear Reaction
14 Sep 2016
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The vast majority of chemicals are metals. Are solids at room temp. (except for mercury) Are ductile (can be drawn into wires) Usually have fairly high densities (since individual metals atoms are packed close to each other) Are more diverse in their physical properties than metals. Metalloids = elements that have some typically metallic properties and other properties that are more characteristic of nonmetals. All alkali metals are soft metals, have low melting points, and react violently with water. Alkaline-earth metals are harder than alkali metals and all combine with oxygen from the air to form oxides, all react with chlorine in a __cl 2 pattern. Halogens all react readily with metals, all consist of diatomic molecules (molecules that contain two atoms like n2), all react with alkali metals to form salts. Noble gases do not react readily with any other elements, and some do not react with any elements at all. Elements" properties are periodic (aka have patterns)
