Chapter 4 Section 3 Metals

Properties of Metals Physical Properties of metals include luster, malleability, ductility, and conductivity (Thermal conductivity and Electrical conductivity) Chemical Properties include reactivity and corrosion; the gradual wearing away of a metal due to chemical reaction.

Metals in the Periodic Table Alkali Metals Group one elements 1 electron in the outermost energy level Very reactive Soft; silver-colored; shiny; low density. Alkaline-earth Metals Group two elements 2 electrons in the outermost energy level Very reactive, but less reactive than alkali metals Silver-colored; more dense than alkali metals.

Transition Metals Metals in mixed Groups Lanthanides 1 or 2 electrons in the outermost energy level Less reactive than alkaline-earth metals Shiny good conductors of thermal energy and electric current. Metals in mixed Groups Found in groups 13-15 Never found uncombined in nature. Lanthanides The top row of the two rows of elements that are placed below the main part of periodic table. Lanthanides are sometimes mixed with metals to form alloys

Actinides The row below lanthanides Many of the actinides are artificially created. Synthetic Elements Scientists make synthetic elements by forcing nuclear particles to crash into one another. Scientists also use particle accelerator that moves atomic nuclei at higher and higher speeds until they crash into one another, sometimes forming heavier elements.