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B. The development of Chemical Elements Periodical System

B. The development of Chemical Elements Periodical System. B. Perkembangan Sistem Periodik Unsur Kimia. Teaching Learning Objectivers. The student can explain Lavoisier elements classification. The student can explain Dobereiner elements classification.

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B. The development of Chemical Elements Periodical System

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  1. B. The development of Chemical Elements Periodical System B. Perkembangan Sistem Periodik Unsur Kimia

  2. Teaching Learning Objectivers • The student can explain Lavoisier elements classification. • The student can explain Dobereiner elements classification. • The student can explain Newlands elements classification. • The student can explain formation Mendeleyev and Meyer able. • The student can explain formation the modern periodic table. • The student can explain correlation of electron configuration with period and group.

  3. 1. Lavoisier Elements Classification • Pengelompokan unsur-unsur menjadi logam dan non logam. • Antoine Laurent Lavoisier mencatat 16 unsur logam dan 7 bukan logam

  4. 2. Dobereiner Element Classification • Dobereiner made groups of every three chemical elements with similar properties (triad) base on its atomic weight rising. • The classification of chemical element according to Dobereiner is known as Dobereiner triad law

  5. Several Triad of Chemical Element

  6. 3. Newlands Element Classication (Octave Law) • Newlands classified chemical elements based on its atomic weight rising. • Element properties will be repeated after every eight elements (Octave Law), it means that the 8thelement will have similar properties with the 1st element.

  7. Chemical Elements Classification Based on Newlands Octave Law

  8. 4. Mendeleyev and Meyer Periodic Table • Pada saat yang bersamaan di dua tempat yang berbeda tanpa kerja sama dan komunikasi dua orang ilmuwan, yaitu Julius Lothar Meyer (1869) dari jerman dan Dmitri Ivanoich Mendeleyev (1871) dari Rusia, melakukan penyusunan dan pengklasifikasian unsur-unsur berdasarkan kenaikan massa atomnya. Mereka menyimpulakan tentang adanya keperiodikan sifat-sifat unsur yang hampir sama

  9. Lothar Meyer dalam pengkajiannya tentang fenomena keperiodikan unsur lebih condong pada sifat-sifat fisis unsur. • Mendeleyev mengamati keperiodikan dalam sifat-sifat kimia unsur, baru dikenal 65 unsur dengan menggunakan sistem kartu yang masing-masing dilengkapi dengan sifat-sifat unsur, unsur-unsur yang sifatnya sama dikelompokkan ke dalam golongan-golongan unsur.

  10. Part of Mendeleev's periodic table

  11. Prediction of Germanium’s Properties

  12. 5. The Modern Periodic Table • Merupakan penyempurnaan sistem periodik Mendeleyev • Dikemukakan oleh Henry G Moseley • Disusun menurut kenaikan nomor atom • Terdiri dari lajur vertikal yang disebut golongan dan lajur horisontal disebut periode. • Dalam satu golongan mempunyai elektron valensi yang sama dan memilikisifat-sifat kimia dan fisika yang hampir mirip.

  13. Correlation of Electron Configuration with Period and Group • The electron configuration of atom can be used to determine an atom position in periodic table. Example : 35Br Konfigurasi elektronnya 2 18 8 7 Elektron valensinya : 7 Golongan VIIA Jumlah kulit : 4 Perioda : 4

  14. Vertically into Groups Horizontally Into Periods

  15. Golongan adalah kolom vertikal dalam SPU terdiri atas: • Golongan utama (A): IA sampai dengan VIIIA

  16. Alkali Metals

  17. Alkaline Earth Metals

  18. Halogens

  19. Noble Gases

  20. Golongan transisi (B) : IB sampai dengan VIIIB. Semua unsur transisi adalah logam Terdapat deret lantanida dan deret aktinida • Perioda adalah baris horisontal dalam SPU, ada 7 perioda, dalam satu perioda memiliki jumlah kulit yang sama

  21. Transition Metals

  22. These elements are also called the rare-earth elements. InnerTransition Metals

  23. Correlation of Electron Configuration with Period and Group • The electron configuration of atom can be used to determine an atom position in periodic table. Example : 35Br Konfigurasi elektronnya 2 18 8 7 Elektron valensinya : 7 Golongan VIIA Jumlah kulit : 4 Perioda : 4

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