Topic 20 line about metal
Answers
Explanation:
Most of the elements in the periodic table are metals, plus there are numerous alloys made from mixtures of metals. So, it's a good idea to know what metals are and a few things about them. Here are several interesting and useful facts about these important materials:
The word metal comes from the Greek word 'metallon,' which means quarry or to mine or excavate.
The most abundant metal in the universe is iron, followed by magnesium.
The composition of the Earth is not entirely known, but the most abundant metal in the Earth's crust is aluminum. However, the Earth's core likely consists mainly of iron.
Metals are primarily shiny, hard solids that are good conductors of heat and electricity. There are exceptions. For example, gold is very soft and mercury is a liquid. However, there are no metals that act as insulators rather than conductors.
About 75% of the chemical elements are metals. Of the 118 known elements, 91 are metals. Many of the others possess some of the characteristics of metals and are known as semimetals or metalloids.
Metals form positively charged ions called cations through loss of electrons. They react with most other elements, but especially nonmetals, such as oxygen and nitrogen.
The most commonly used metals are iron, aluminum, copper, zinc, and lead. Metals are used for an enormous number of products and purposes. They are valued for their ability to strength, electrical and thermal properties, ease of bending and drawing into wire, wide availability, and participation in chemical reactions
Answer:
any of class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light.
Metals are minerals or substances that form naturally below the surface of the earth. Most metals are lustrous or shiny. Matels ate inorganic, which means they are made of substances that were never alive.
Matels are natural compounds of earth's crust, in which they are generally found in the form of metal ores, associated both with each other and with many other elements. They are also naturally present in the rocks washed by surface water and groundwater and in atmospheric dust.
Examples of Metals
Matels is very strong and durable and therefore is used to make many things. These are used for making automobiles, satellites, cooking utensils, etc.