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Periodic Table of Elements
week 28 13-14
Terms in this set (15)
A horizontal row of elements in the periodic table
Columns going up and down on the periodic table
All have a silvery appearance, as soft as butter, the most reactive metals on the periodic table
alkali earth metals
Elemnets in group 2, harder, higher melting point, and denser than alkali metals. Reactive, but less than corresponding alkali metal. The two most common are magnnesium and calcium.
Groups 3-12, less reactive than alkali-earth metals, shiny, good conductor of thermal energy and electrical current, high density.
Ductile and typically lustrous substances that are good conductors of electricity and heat.
An element that shares some properties with metals and some with nonmetals.
An element that tends to be a poor conductor of heat and electric current; usually gases or brittle solids at room temperature.
Means "salt former" and are highly reactive nonmetals found in family 17.
Elements in group 18 of the periodic table that rarely combine with other elements and are gases under normal conditions.
The average mass of all the isotopes of an element, approximately equivalent to the number of protons and neutrons in the atom.
Number of protons in the nucleus of an atom.
An abbreviation or short representation of a chemical element.
How tightly packed the matter in a substance is.
A material's ability to allow heat or electric charges to flow.
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