Metalloids Elements with properties intermediate between metals and

Metalloids Elements with properties intermediate between metals and nonmetals B, Si, Ge, As, Sb, Te, Po, and At. 

In general, metalhc character decreases across a period and increases down a group of the periodic table. Metalloids are elements with properties intermediate between metals and nonmetals. 

Metalloids Elements with properties Intermediate between those of metals and nonmetals. and falling between them In the periodic table Semiconductors Metalloid elements with electrical conductivity Intermediate between that of metals and nonmetals... 

Metalloids are elements with properties intermediate between those of metals and nonmetals. Because the definition of metallic character depends on a combination of properties, there may be some variation in the elements identified as metalloids in different sources. Astatine (At), for example, is listed as a metalloid in some sources and a nonmetal in others. 

Metalloid An element, such as silicon or arsenic, that has properties that are intermediate between metals and nonmetals (such as the ability to conduct electricity), or shares properties with both metals and nonmetals. 

Boron—along with silicon, germanium, arsenic, antimony, and tellurium—is one of a few elements, called metalloids, with properties intermediate between those of metals and nonmetals. Although they have a luster like metals, metalloids do not form positively charged ions (cations). The melting temperature of boron is very high, 2190°C. Boron is added to copper, aluminum, and steel to improve their properties. It is used in control rods of nuclear reactors because of the good neutron-... 

A metalloid or semimetal is an element with properties that are intermediate between those of metals and nonmetals, such as semiconductivity. They are found between metals and nonmetals in the periodic table (see shaded elements in Figure 1.2). 

Metalloid (or semimetal) An element with properties that are intermediate between those of metals and nonmetals such as semiconductivity. 

The elements considered so far lie on the border between covalent and molecular solids. Other elements, those of intermediate electronegativity, exist as solids on the border between metallic and covalent these are called metalloids. Antimony has a metallic Inster, for example, bnt is a rather poor condnctor of electricity and heat. Silicon and germaninm are semiconductors, with electrical condnctivities far lower than those of metals bnt still significantly higher than those of trne insulators such as diamond. Section 22.7 examines the special properties of these materials more closely. 

Notice that they are numbered from 1 to 18 from left to right. Each group contains elements with similar chemical properties. For example, the elements in Group 2 are beryllium, magnesium, calcium, strontium, barium, and radium. All of these elements are reactive metals with similar abilities to bond to other kinds of atoms. The two major categories of elements are metals and nonmetals. Metalloids have properties intermediate between those of metals and nonmetals. 

The metalloids, or semiconducting elements, are located between nonmetals and metals in the p-block. They are mostly brittle solids with some properties of metals and some of nonmetals. The metalloid elements have electrical conductivity intermediate between that of metals, which are good conductors, and nonmetals, which are nonconductors. 

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