________ is seldom used as a free metal, but its compounds are needed for life.
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Antimony
________ is a metalloid, and bismuth is a metal.
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Graphite
________ is a black powder that consists of hexagonal layers of carbon atoms.
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Phosphorus
________ is a nonmetal that has three allotropes.
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Mercury
________ is the only metal that is not a solid at room temperature.
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Aluminum
________ is used frequently in the construction of air- planes because it is light and strong.
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Halogen lights
________ contain small amounts of bromine or iodine.
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Radioactive Element
________: one in which the nucleus breaks down and gives off particles and energy.
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Sulfur
________ is a nonmetal that exists in several allotropic forms.
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cerium
Lanthanum, ________, praseodymium, and samarium are used with carbon to make a compound that is used extensively by the motion picture industry.
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chemical reactions
In ________, metals tend to give up electrons easily because of the strength of charge of the protons in the nucleus.
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poor conductors of heat
As a group, nonmetals are ________ and electricity.
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Ductile
________: can be drawn into wires.
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Fluorine
________ is the most chemically active of all elements.
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Uranium
________ is best known for its use in nuclear reactors and in weapons applications, but one of its compounds has been used as photographic toner, as well.
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Silicon
________ is second only to oxygen in abundance in Earths crust.
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Sublimation
________: The process of a solid changing directly to a vapor without forming a liquid.
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Zinc
________ and cadmium often are used to coat, or plate, other metals such as iron because of this protective quality.
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Chromium
________ is important because it is used to harden steel, to manufacture stainless steel, and to form other alloys.
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Thorium
________ and uranium are the actinides found in the Earths crust in usable quantities.
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Hydrogen
________ can gain an electron when it combines with alkali and alkaline earth metals.
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Allotropes
________: different forms of the same element, have different molecular structures.
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Carbon
________ occurs as an element in coal and as a compound in oil, natural gas, and foods.
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Chlorine compounds
________ are used to disinfect water.
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Semiconductors
________: elements that conduct an electric current under certain conditions.
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reactive diatomic covalent
In the gaseous state, the halogens form ________ molecules and can be identified by their distinctive colors.
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Nitrogen
________ is the fourth most abundant element in your body.
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Copper
________ often is used in electrical wiring because of its superior ability to conduct electricity and its relatively low cost.
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Diatomic Molecule
________: consists of two atoms of the same element in a covalent bond.
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Metalloids
________: an form ionic and covalent bonds with other elements and can have metallic and nonmetallic properties.
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Nonmetals
________: elements that usually are gases or brittle solids at room temperature.
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Metallic Bonding
________: positively charged metallic ions are surrounded by a cloud of electrons.
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Magnesium metal
________ is one of the metals used to produce the brilliant white color in fireworks.
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Mercury
________ is a silvery, liquid metal- the only metal that is a liquid at room temperature.
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ductile
Like other metals, Group 1 metals are shiny, malleable, and ________.
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Sulfur
________ combines with metals to form sulfides of such distinctive colors that they are used as pigments in paints.
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Metals
________: usually have common properties- they are good conductors of heat and electricity, and all but one are solid at room temperature.
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Silicon
________ occurs as two allotropes.
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Hydrogen
________ is highly reactive.
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Mercury
________ is poisonous and can accumulate in the body.
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Malleable
can be hammered or rolled into sheets
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Ductile
can be drawn into wires
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Radioactive Element
one in which the nucleus breaks down and gives off particles and energy
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Transition Elements
elements in Groups 3 through 12 in the periodic table
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Nonmetals
elements that usually are gases or brittle solids at room temperature
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Diatomic Molecule
consists of two atoms of the same element in a covalent bond
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Salt
an ionic compound
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Sublimation
The process of a solid changing directly to a vapor without forming a liquid
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Metalloids
an form ionic and covalent bonds with other elements and can have metallic and nonmetallic properties
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Allotropes
different forms of the same element, have different molecular structures
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Semiconductors
elements that conduct an electric current under certain conditions
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Transuranium Elements
Elements having more than 92 protons, the atomic number of uranium
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