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PS Ch. 17 & 18 Test

Vocabulary for the test 17 and 18

QuestionAnswer
Monotomic elements have 1 atom in natural state
Diatomic Elements have 2 atoms in the natural state
Diatomic Elements are Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, Iodine
Periodicity The repetition of certain properties at regular intervals when elements were placed in order of atomic mass
Dmitri Mendeleev Created the modern Periodic Table
Henry Moseley Discovered how to use x-rays to count the protons in an atom's nucleus to find an element's atomic number
Metals luster, malleable, conduct electricity, ductile
Non-metals lack luster, brittle, don't conduct electricity, not ductile
The Second Law of Thermodynamics states All natural processes move toward a state of minimum energy
What states that atoms are most stable when they have a full 8 electron in their valence energy level Octet Rule
Exceptions to the Octet Rule H, Li, Be, B
What atoms when they gain and lose electrons Ions
Deals with the strength of attraction of electrons to unbonded atoms Electron Affinity
Electronegativity Deals with an atom's ability to attract and hold electrons when bonded to other atoms
Covalent Bonds Non-metal/non-metal; share electrons
Ionic Bonds Metal/Non-metal; gives and receives electrons
Metallic Bonds Metal/Metal; everyone shares the electrons
Atoms with weak electronegativities have only a few loosely held valence electrons Electron Sea Theory
Created by: chris_brown445