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D. Table Of The Elements. Se ul Kee Jin Tadao He rmida S Er g io Cue Ger Ar do Lopez Ma rian Molina. History. Dimitri Mendeleev was the author of the 1 st periodic table. The modern one is based on his findings and theories in Periodic Chemistry. . History.
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D Table Of TheElements Se ulKeeJin TadaoHe rmida S Er gioCue GerAr do Lopez Marian Molina
History • Dimitri Mendeleev was the author of the 1st periodic table. The modern one is based on his findings and theories in Periodic Chemistry.
History • It is used by chemists to observe the chemical and physical properties, characteristics, patterns and relationships between over 100 elements in just one chart.
View • Familiesorgroups of elements are set in thecolumns (From 1 to 18 and theone of La and Ac). • Periods are set in therows (From 1 to 7).
Atomicnumber • Elements are definedbythenumber of protons in theirnucleus. Allelementsconform a perfectsuccession of integernumbers, fromoneto 118. (ThisisrepresentedbyZ). H 1
Atomicnumber • Each Chemical element on the Periodic table is given a unique Atomic Number.
Atomicnumber in thetable: justfilltheblanks in increasingorder
Metals and non metals Besidesthecommon ideas asociatedwiththeseclassification (conductivity, shine, etc.) Chemicalfeatures (electronegativity, forinstance) define thischaracter, and are shown in the PT.
Familiesorgroups: similar chemicalbehavior A group or family is a vertical column in the periodic table. Groups are considered the most important method of classifying the elements.
Familiesorgroups: similar chemicalbehavior In most of the groups, the elements have very similar properties and exhibit a clear trend in properties down the group.
Periods • The Periods in the Periodic Table are any of the 7 horizontal rows that contain elements arranged in order of increasing atomic number
Periods • The Atomic number increases as you move across a period (row) • Each period starts with Alkali metal and ends with a Noble gas • The first element of each period (row) is most reactive and last element is chemically inert
The 18 Groups in the Periodic Table are any of the vertical columns that contain elements arranged in order of increasing atomic number • The Atomic number increases as you go down (in the GROUP) • Elements with similar properties are arranged in the same group
Blocks in theperiodictable Eachfamilyorgroup shows identicalelectronicconfigurations in thelastlevel.