Physical Science Vocab Chapter 19

14 terms by Wiilover2000 

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This vocab list is about metals, nonmetals, and mixed groups

allotrope

different forms of the same element having different molecular structures

diatomic molecule

a molecule that consists of two atoms of the same element

ductile

ability of metals to be drawn into wires

malleable

ability of metals and alloys to be rolled or hammered into thin sheets

metal

element that typically is a hard, shiny solid, is malleable, and is a good conductor of heat and electricity

metallic bonding

occurs because electrons move freely among a metal's positively charged ions and explains properties such as ductility and the ability to conduct electricity

metalloid

element that shares some properties with metals and some with nonmetals

nonmetal

element that usually is a gas or brittle solid at room temperature, is not malleable or ductile, is a poor conductor of heat and electricity, and typically not shiny

radioactive element

element, such as radium, whose nucleus breaks down and emits particles and energy

salt

compound formed when negative ions form an acid combine with positive ions form a base

semiconductor

materials having conductivity properties between that of metals (good conductors) and nonmetals (insulators) and having contollable conductivity parameters

sublimation

the process of a solid changing directly to a vapor without forming a liquid

transition element

elements in Group 3 through 12 of the periodic table; occur in nature as uncombined elements and include the iron triad and coinage metals

transuranium element

elements having more than 92 protons, all of which are synthetic and unstable

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