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group/family vertical column of elements in the periodic table; have the same number and arrangement of valence electrons
period horizontal row of elements in the periodic table
valence electrons electrons located in the last energy level/shell of an atom
metals element that have the property of shiny luster, ductility, and malleability. most elements are metals
luster the way a material reflects light
malleable able to be hammered into different shapes
ductile able to be drawn into thin wires [metals]
nonmetals elements that have different property then metals; dull and brittle; located to the right of the zig zag line on the periodic table
halogens elements that make up group 17 on the periodic table; most likely to form negative ions
noble gasses elements that make up group 18 on the periodic table; all elements contain a stable number of valence electrons
alkali metals metals in group one of the periodic table; they are very reactive
alkaline earth metals metals in group 2 of the periodic table
metalloids elements that have the property's of both metals and non metals
isotope atom of a elements that has the same number of protons as the other atom, but a different number of neutrons
ion charged atom formed when the atom gains or looses electrons
ionic bond bond formed between atoms that have gained or lost electrons; one atom transfers electrons to another
covalent bond bond formed when atoms share electrons
subscript little numbers below the line that tells you how many atoms of an element there are in a molecule EX: H2O, the subscript is 2
coefficient regular sized numbers in front of a formula that tells you how many molecules there are EX: 3 H2O, the coefficient is 3
reactant molecules to the left of the arrow in the chemical equation
Created by: zac2hawks2