A pdf file with detailed explanation about arrangement of elements in the Periodic Table, how groups of elements are formed & their chemical and physical characteristic and many more.
The Periodic
Table of
Element
@ChemistryWithQistina
, Table of Contents
01 02 03
4.1 4.2 4.3-4.5
Development of the The Arrangement in the Elements in Group 1,
Periodic Table of Elements Periodic Table of Elements 17 & 18
04 05
4.6 4.7
Elements in Period 3 Transition Metals
@CHEMISTRYWITHQISTINA
, 4.1
Development of The Periodic Table
, Contribution of Scientist in the Periodic Table
Scientist Contributions
1. Wrote the first list contained 33 elements.
Antoine Lavoisier 2. Distinguished metal & non-metal elements.
3. Classified elements into 4 groups, including light & heat.
1. Classified 3 elements of the same nature into group =
triads.
Johann W.
Eg : Lithium, Sodium, Potassium = a triad
Döbereiner
2. Showed the relationship between the chemical properties of
elements & atomic mass
1. Arranged elements according to their increasing atomic
masses.
2. Arranged 7 elements in a row because the chemical &
John Newlands physical properties of the first element recurred at every 8th
element.
This is called as : Law of Octaves.
3. The law only conformed by the first 17 elements.
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