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Some periodic tables include a zig-zag line to distinguish between metals and metalloids. The line begins below boron (B) and extends between bismuth (Bi) and polonium (Po) or down between livermorium (Lv) and Tennessine (Ts). In reality, the metals near the line often display nonmetallic properties the nonmetals have some metallic character ...
Elements of the periodic table are grouped as metals, metalloids or semimetals, and nonmetals. The metalloids separate the metals and nonmetals on a periodic table. Also, many periodic tables have a stair-step line on the table identifying the element groups.
From left to right in the periodic table, the nonmetals can be divided into the reactive nonmetals and the noble gases. The reactive nonmetals near the metalloids show some incipient metallic character, such as the metallic appearance of graphite, black phosphorus, selenium and iodine.
Elements that tend to gain electrons to form anions during chemical reactions are called non-metals. These are electronegative elements. They are non-lustrous, brittle and poor conductors of heat and electricity (except graphite). Non-metals can be gaseous, liquids or solids.
Elements are further classified into metals, non-metals, and metalloids based on their properties, which are correlated with their placement in the periodic table. With the exception of hydrogen, all elements that form positive ions by losing electrons during chemical reactions are called metals.
Metals are on the left side of the periodic table. Nonmetals are on the right side of the table. Metalloids occur in zig-zag line on the table, separating metals and nonmetals.
The unabridged version of the Periodic Table of the Elements, showing all 118 elements and emphasizing the fact that the vast majority of them are metals (shaded blue). Artificial elements are denoted by the outlined symbols. Metalloids are shaded lavender and nonmetals are rose.
On the periodic table, the elements colored yellow, which generally border the stair-step line, are considered to be metalloids. Notice that aluminum borders the line, but it is considered to be a metal since all of its properties are like those of metals. Silicon is a typical metalloid (see figure below).
Elements that tend to gain electrons to form anions during chemical reactions are called non-metals. These are electronegative elements. They are non-lustrous, brittle and poor conductors of heat and electricity (except graphite). Non-metals can be gaseous, liquids or solids.
Some elements between the metals and non-metals in the periodic table have properties which are a mixture of the properties of metals and non-metals. These elements are called metalloids or...