12 terms

Periodic Table Vocabulary

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Diatomic molecule
a molecule that consists of two atoms of the same element.
Metal
element that typically is a hard, shiny solid, is malleable, and is a good conductor of heat and electricity.
Nonmetal
element that is usually a gas or brittle solid at room temperature, is not ductile or malleable, is a poor conductor of heat and electricity, and typically is not shiny.
Allotrope
different forms of the same element have different molecular structures
Radioactive element
element, such as radium, whose nucleus breaks down and emits particles and energy
Metallic Bonding
occurs because electrons move freely among a metal's positively charged ions and explains properties such as ductility and the ability of conduct electricity.
Ductile
ability of metals to be drawn into a wire.
Malleable
ability of a meal to be hammered or rolled into thin sheets
Metalloid
element that shares some properties with metals and some with nonmetals
Transition element
elements in groups 3 through 12 of the periodic table occur in nature as uncombined elements, and include iron triad and coinage metals
Transuranium element
elements have more than 92 protons.
Semiconductor
elements (silicon and germanium) that will conduct an electric current under certain conditions.
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