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Ch. 17-18 Physics

Diatomic Elements H,N,O,F,Cl,B,I (add sub 2's below each)
Periodic Law of Elements The properties of elements vary a periodic or reoccuring pattern with their atomic #'s.
Electron Affinity Deals with the strength of attraction of electrons to unbonded atoms.
Ionic Bonds Giving away and taking electrons (Metals/NonMetals)
Covalent Bonds Sharing electrons (non metals)
Metallic Bonds Everyone shares electrons (Metals)
Periodicity The repetition of certain properties at regular intervals when elements were placed in order of atomic mass.
Dmitri Mendeleev arranged the elements into what is now known as the periodic table. He left BLANK SPACES
Johann Dobereiner Arranged the elements into triads.
How man naturally occurring elements are there? 92
Cations positive
Anions negative
Monotomic Elements He, Ne, Ar, Kr, Xe, Rn (all noble gases)
Electron Negativity deals with an atom's ability to attract and hold electrons when bonded to other atoms
Electron Sea Theory Atoms with weak electronegativities usually have only a few loose valence electrons
What does the family group tell you? How many valence electrons are in an element
What does the period tell you? How many energy levels an element has.
Metals Luster, Malleable, Conduct Electricity, Ductile
Non Metals Lack Luster, Brittle, Don't Conduct Electricity, Not Ductile.
Octet Rule Atoms are only happy when they have 8 electrons in their valence energy level.
Element Any pure substance that is made of only one kind of atom
How many elements total are there? 117
Liquid Elements? Hg and Br
Gas Elements? H,He,N,O2,F,Ne,Cl,Ar,Kr,Xe,Rn
Solid Elements Every other element is a solid.
Created by: emma-sanders