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7 Cards in this Set

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  • Back
What is the Periodic law
THe chemical properties of the elements are dependent, on a systematic way, upon heir atomic numbers.
How are the elements arranged as far as rows and colums
-Periods (rows); there are 7 periods, representing the 7 quantum numbers.
-Groups (columns)
What does the Roman numeral and the A and B represent in each group?
The Roman Numeral represents the number of valence electrons.
-A elements are the Representative elements,
-B elements are the nonrepresntative elements, including the transition elements.
*The electron config is shown by these numbers. Example to come.
Representative elements
those in froups 1A through 7A, all of with have incompleteleyfilled s or p subshells of the hifhest principal number.
Note: with the exception of the noble gases (Group 8) elements all have comletely filled p subshells.
Nonrebresentative elements (including the transition elements.
have partly filled d sublevels, and the lanthanide and actinide series, which have partly filled f sublevels.
An element in Group VA will have a valence electron config of what?
s^2p^3(2 + 3 = 5 valenve electrons).
what is a general trend when you go down and across the periodic table.
-accross more electrons in valence shell so more tightly bound to nucleous
-down more shells so less tightly around nucleous.