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Chem 06 Periodicity

Terms associated with the periodic table and its trends.

QuestionAnswer
when elements are arranged in order of increasing atomic number, physical/chemical properties repeat at regular intervals periodic law
vertical column on periodic table containing elements with similar chemical properties (and # of valence electrons) group/family
horizontal row on periodic table containing all elements with the same # of occupied energy levels period/series
# of groups on the period table 18
# of periods on the periodic table 7
name of group 1 elements alkali metals
name of group 2 elements alkaline earth metals
collective name of elements in groups 3-12 on the periodic table transition metals
how groups 13-16 on the periodic table are usually named by the top element (ex: 15 = nitrogen family)
name of group 17 elements halogens
meaning of word 'halogen' salt former
name of group 18 elements noble gases
person who made the first periodic table Mendeleev
abbreviation for name of element symbol
whole # in each periodic table block atomic number
decimal (usually) number in each periodic table block atomic mass
largest classification of elements (~75%) found on 'left' side of the periodic table metals
classification of elements on right side of the periodic table nonmetals
elements that are almost all solids that have luster (are shiny), are malleable and ductile, and are good conductors metals
elements that are either gases or brittle solids that may be dull and poor conductors nonmetals
smallest classification of elements located along the zig-zag line on the periodic table metalloids
classification of an element that might be a brittle solid that is a good conductor metalloid
element along the zig-zig line on the periodic table that is not a metalloid aluminum (Al)
element on left side of the periodic table that is not a metal hydrogen (H)
only element in 'tall' (group A) families whose group # does NOT tell its # of valence electrons helium (He)
half the distance between adjacent nuclei in a solid (or between the nuclei of bonded atoms) atomic radius
unit for measuring atomic radius picometer (pm)
trend for atomic radius down a group increases
trend for atomic radius across a period decreases
energy required to remove the loosest electron from an atom ionization energy
unit for measuring ionization energy kilojoules per mole (kJ/mol)
trend for ionization energy down a group decreases
trend for ionization energy across a period increases
measure of the attraction of an atom for addition electrons electron affinity
unit for measuring electron affinity kilojoules per mole (kJ/mol)
trend for electron affinity down a group decreases
trend for electron affinity across a period increases (but drops for noble gases)
(unitless) relative measure of atom's attraction for shared electrons in a bond electronegativity
range of values for the electronegativity scale 0.0 - 4.0
element with highest electronegativity fluorine (F)
element with lowest electronegativity value cesium (Cs) or francium (Fr)
normal overall charge of an atom neutral
name for an atom that has an overall charge due to gaining or losing electrons ion
name for a positively charged ion (atom that lost electrons) cation ("ca+ion")
name for a negatively charged ion (atom that gained electrons) anion ("a.n.ion")
elements that gain electrons and form - ions that are LARGER than the original atom nonmetals (right side of PT)
classification of elements that tend to lose electrons metals
classification of elements that tend to gain electrons nonmetals (except H & noble gases)
how does the ionic radius of elements that gain electrons and form anions compare to the original atomic radius? ionic radius is larger
how does the ionic radius of elements that lose electrons (left side of PT) and form cations compared to the original atomic radius? ionic radius is smaller
how do you identify the room temperature state of an element on our classroom periodic table symbol color (black=solid, red=gas, blue=liquid)
Created by: goakley