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Ch. 17-18 Physics
Term | Definition |
---|---|
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. |