Year
Metals
Metals

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Definitions

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Introduction

Metals are any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light. Approximately three-quarters of all known chemical elements are metals. The most abundant varieties in the Earth’s crust are aluminum, iron, calcium, sodium, potassium, and magnesium. The vast majority of metals are found in ores (mineral-bearing substances), but a few such as copper, gold, platinum, and silver frequently occur in the free state because they do not readily react with other elements. (Britannica, 2015) Metals are used in their pure form as well as in alloys and we see their applications every day in tools, machines, ornaments and structures.

Types of Metals

Metals

Properties

 

 

Husrev ay. (2014, August 25). Physical properties of metals [Video file]. Retrieved from https://www.youtube.com/watch?v=NHWcwAijMvk

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