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periodic table vocab

TermDefinition
Noble gases nonreactive gases, only found in there own nature. used in neon signs, balloons and light bulbs.
Transition metals less reactive metal. Hard dense metal that are useful as building materials, jewelry and coins. also used as oxides to make paints and pigments.
Alkaline Earth metals not as reactive as alkali metals, but still never found uncombined in nature. Serve as important minerals for our body.
Alkali metal they are so reactive that they are never found uncombined in nature. Metals soft enough to be cut with a butter knife.
chemical reaction the ability of atoms to combine or separate with other atoms to create new substances.
Groups the group of families on the periodic table are the columns numbered from 1-18.
Metalloids elements on both sides of zig zag line (staircase) have properties of both metals and nonmetals.
non-metals Has a dull appearance, is a poor conductor of heat and electricity. Can break easily, not ductile, not malleable, low density, low melting point and less reactive then metals.
metals solid at room temperature{except mercury}, shiny luster, can bend to wire, malleable, good conductor, high density and high melting point.
periods the period on the periodic table are the rows numbered from 1-7. The atomic number increases from left to right, those in the same period have the same number of energy levels or shells. Chemical properties are not all similar.
Periodic table arranges all of the known elements in order of increasing atomic number (# of protons).
alloy is a homogeneous mixture of two or more metals.
Radioactivity the process by which an unstable atomic nucleus will lose energy though the emission of particles or electromagnetic wave
electromagnetic waves known as radiation
Created by: 1645917