Periodic Table

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