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Periodic Table
Vocabulary Words Page 174 & 187
20
Chemistry
11th Grade
10/21/2011

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Term
Periodic Law
Definition
States That When The Elements Are Arranged By Increasing Atomic Number, There Is A Periodic Repetition Of Their Properties.
Term
Group
Definition
A Vertical Column Of Elements In The Periodic Table Arranged In Order Of Increasing Atomic Number; Also Called A Family.
Term
Period
Definition
A Horizontal Row Of Elements In The Modern Periodic Table.
Term
Representative Element
Definition
Elements From Group 1, 2, And 13-18 In The Modern Periodic Table, Possessing A Wide Range Of Chemical And Physical Properties.
Term
Transition Element
Definition
Elements In Groups, 3-12 Of The Modern Periodic table And Are Further Divided Into Transition Metals And Inner Transition Metals.
Term
Metal
Definition
An Element That Is Solid At Room Temperature, A Good Conductor Of Heat And Electricity, And Generally Is Shinny; Most Metals Are Ductile And Malleable.
Term
Alkali Metal
Definition
Group 1 Elements, Except For Hydrogen, They Are Reactive And Usually Exist As Compounds With Other Elements.
Term
Alkaline Earth Metal
Definition
Group 2 Elements In The Modern Periodic Table And Are Highly Reactive.
Term
Transition Metal
Definition
An Element In Groups, 3-12 That Is Contained In The D-Block Of The Periodic And, With Some Exceptions, Is Characterized By A Filled Outermosts Orbital Of Energy Level.
Term
Inner Transition Metal
Definition
A Type Of Group B Element That Is Contained In The F-Block Of The Periodic Table And Is Characterized By A Filled Outermost Orbital, And Filled Or Partially Filled 4f And 5f Orbitals.
Term
Lanthanide Series
Definition
In The Periodic Table, The F-Block Elements From Period 6 That Follow The Element Lanthanum.
Term
Actinide Series
Definition
In The Periodic Table, The F-Block Elements From Period 7 That Follow The Element Actinium.
Term
Nonmetal
Definition
Elements That Are Generally Gases Or Dull, Brittle Solids That Are Poor Conductors Of Heat And Electricity.
Term
Halogen
Definition
A Highly Reactive Group 17 Element.
Term
Noble Gas
Definition
An Extremely Unreactive Group 18 Element.
Term
Metalloid
Definition
An Element That Has Physical And Chemical Properties Of Both Metals And Nonmetals.
Term
Ion
Definition
An Atom Or Bonded Group Of Atoms With A Positive Or Negative Charge.
Term
Ionization Energy
Definition
The Energy Required To Remove An Electron From A Gaseous Atom.
Term
Octet Rule
Definition
States That Atoms Lose, Gain, Or Share Electrons In Order To Acquire The Stable Electron Configuration Of A Noble Gas.
Term
Electronegativity
Definition
Indicates The Relative Ability Of An Element's Atoms To Atrract Electrons In A Chemical Bond.
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