F. Define the following terms:
1. metal
Answers
Answer:
a type of solid substance that is usually hard and shiny and that heat and electricity can travel through
Answer:
type of solid substance that is usually hard and shiny and that heat and electricity can travel through
Explanation:
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Metal
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Metal, any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light.
block of gold
block of gold
Block of metallic gold.
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Metal
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Ellsworth Kelly
David Smith
Jean Tinguely
Sir Anthony Caro
Sir Ian MacGregor
William E. Dodge
Alberto Burri
Nicolas Schöffer
Seymour Lipton
Gustav Tammann
RELATED TOPICS
Metalwork
Chemical element
Rare-earth element
Transition metal
Alkali metal
Actinoid element
Sodium
Alkaline-earth metal
Platinum group
Halogen
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.
ore. iron ore minerals, rock, metal, metallic iron
BRITANNICA QUIZ
Metals: Fact or Fiction?
Silver is the most conductive of metals.
liquid metal
liquid metal
Researchers have developed a magnetic liquid metal and demonstrate how magnets make the new material move and stretch in 3D space.
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Metals are usually crystalline solids. In most cases, they have a relatively simple crystal structure distinguished by a close packing of atoms and a high degree of symmetry. Typically, the atoms of metals contain less than half the full complement of electrons in their outermost shell. Because of this characteristic, metals tend not to form compounds with each other. They do, however, combine more readily with nonmetals (e.g., oxygen and sulfur), which generally have more than half the maximum number of valence electrons. Metals differ widely in their chemical reactivity. The most reactive include lithium, potassium, and radium, whereas those of low reactivity are gold, silver, palladium, and platinum.
The high electrical and thermal conductivities of the simple metals (i.e., the non-transition metals of the periodic table) are best explained by reference to the free-electron theory. According to this concept, the individual atoms in such metals have lost their valence electrons to the entire solid, and these free electrons that give rise to conductivity move as a group throughout the solid. In the case of the more complex metals (i.e., the transition elements), conductivities are better explained by the band theory, which takes into account not only the presence of free electrons but also their interaction with so-called d electrons.