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Science-Periodic Tables

Terms

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periodic law
the law that states that the repeating cheimcal and physical properties of elements change periodically with the atomic numbers of the elements
alkaline-earth metals
one of the elemtents of group 2 of the periodic table
noble gas
one of the elements of group 18 of the periodic table that are unreactive
periodic
describes something that repeats or occurs at regular intervals
nonmetal
an element that conducts heat and electricity poorly, nonmalleable, nonductile
transition metals
shiny, good conductors of heat and electricity
halogen
one of the elements of group 17 of the periodic table; combine with most metals to form salts
alkali metals
one of the elements of group 1 of the period table
group
a verticle column of elements in the periodic table; elements in a group share chemical properties
metal
an element that is shiny and that conducts heat and electricity well
metals
shiny, malleable, ductile, good conductor of heat and electricity
Mendeleev
descovered a pattern of the periodic elements by arranging them according to their atomic mass
Mosley
aranged elements by atomic number
valence electron
an electron that is found on the outermost shell of an atom and determines the atom's chemical properties
period
in chemistry, a horizontal row of elements on the periodic table
metalloids
have properties of both metals and nonmetals; shiny, brittle, hard, good conductor of electric current

Deck Info

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