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PHS Chapter 14 - "The Periodic Table"

Test your understanding of the modern periodic table and the trends found in the table.

AB
Johann Dobreinernoticed sets of 3 elements with similar properties
triadgroup of 3 elements found by Dobreiner to have similar properties
John Newlandswhen he ordered elements by atomic mass noticed the law of octaves
law of octaveswhen ordered by increasing atomic mass every 8th element repeats properties of the first
Dimitri Mendeleevdeveloped periodic law based on atomic mass
original periodic lawphysical and chemical properties are a periodic function of atomic mass
Henry Moseleydeveloped modern periodic law based on atomic number
modern periodic lawphysical and chemical properties of elements are a periodic function of atomic number
period or serieshorizontal row in periodic table
family or groupvertical column in periodic table
elements with same number of valance electronfamily or group
elements with elecrons with the same outermost energy level having at least 1 electronperiod or series
transition elementsname given to elements in groups 3 through 12
alkali metalsname given to elements of group 1
alkaline earth metalsname given to elements of group 2
nitrogen familyname given to elementss of group 15
oxygen familyname given to elements of group 16
halogen familyname given to elements of group 17
noble gasesname given to elements of group 18
lanthanidestransitional elements in period 6 with atomic numbers 57-71
actinidestransitional elements in period 7 with atomic numbers 89-103
ionization energyenergy needed to remove the most loosely held elecron from the outer energy level of an atom in the gas phase
valence shelloutermost energy level containing electrons
valence electronselectrons occupying the outermost energy level of an atom
law of octetsto be stable atoms will gain or lose electrons to have their valence shell hold 8 electrons
sheilding effectattractive force of nucleus is lessened as atomic radius increases because inner kernel electrons repel outer valence electrons
how does ionization energy change going down a familyit decreases
how does the ionization energy change from left to right in a periodit increases
electronegativitya measure of the ability of an atom to attract elements to itself
how does electronegativity change goind down a familyit decreases
how does electronegativity change from left ot right in a periodit increases
covalent atomic radiusdistance between the nucleus and valence shell in an atom that is covalently bonded
van der Waals radiushalf the distance between the nuclei of identical atoms at their point of closest approach when no bond is formed
how does the atomic radius change from left to right in a periodit decreases
how does the atomic radius change reading down a familyit increases
ionic radiusdistance from nucleus of a monoatomic ion to its valence shell
isoelectric speciesatoms or ions with the same electron configuration
how does metallic charater change moving down a familyit increases
how does metallic character change moving from left to right in a periodit decreases
where in the periodic table are the metals foundleft side of the table
where in the periodic table are the nonmetals foundright side of the table
where are the metalloids found in the periodic tablein the "staircase" that goes down grups 13 through 17
what is similar about Si, Ge, As, Sb, Te, and Atmetalloid element
how does melting point change going down a familyit decreases


Science Instructor
Bronxville High School
Bronxville, NY

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