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Chapter 19

vocabulary

TermDefinition
metal usually have common properties they are good conductors of heat electricity, and all but one are solid at room temperature
malleable means they can be hammered or rolled into sheets.
ductile they can be drawn into wires.
metallic bonding positively charged metallic ions are surrounded by a cloud of electrons.
radioactive element is one in which the nucleus breaks down and gives off particles and energy.
transition are those elements in Group 3 through 12 in the periodic table.
nonmetal are elements tat usually are gases or brittle solids at room temperature.
distomic molecule consists of two atoms of the same element in a covalent bond.
salt if a halogen gains an electron from a metal, an ionic compound.
sublimation the process of a solid changing directly to a vapor without forming a liquid.
metalloid can form ionic and covalent bonds with other elements and cha have metallic and nonmetallic properties.
allotropes are different forms of the same element, have different molecular structures.
semiconductor elements that conduct an electric current under certain conditions
transuranium element Elements having more than 92 protons,the atomic number of uranium.
Created by: yadi1998