Mayleens Microlesson
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The document discusses the evolution of the periodic table from early attempts by scientists like Lavoisier, Dalton, and Berzelius to classify and organize the known chemical elements, to the development of the modern periodic table by scientists such as Mendeleev, Ramsay, and Mosely who arranged elements by atomic number and properties. Key events included Mendeleev's creation of the first true periodic table in 1869 and the discoveries of noble gases by Ramsay that led to modifications of the periodic table. The document also describes the key parts and features of the modern periodic table.
Mayleens Microlesson
- 1. The Key to Chemistry Prepared by: Mayleen Piolo-Malagamba MSU Wao Click to continue
- 2. Objectives: • Students will learn the history of the early attempts in the classification of the elements. • Students will know the scientists involved in the arrangement of elements in the periodic table. • Students will identify the parts/features of the periodic table. Click to continue
- 3. Just a check. . . Gro up the pic ture s into yo ur pre fe rre d c ate g o ry e xample : things I like, things I do not like Write yo ur ans we r o n a pie c e o f pape r. Yo u are g ive n 15 minute s o nly to do the ac tivity . Click me if you are ready
- 4. Where Do I Belong? Click to continue
- 5. The Evolution of the Periodic Table 1789 1808 1828 1829 1863 1864 1869 1869 1894 <<<Click me to continue 1913
- 6. Antoine Lavoisier Click me wrote the first extensive list of elements containing 33 elements distinguished between metals and nonmetals
- 7. John Dalton Click me set up a table of elements according to their relative atomic weights
- 8. Jacob Berzelius Click me developed a table of atomic weights introduced letters to symbolize elements
- 9. Johann W. Dobereiner Click me classified the existing elements into group of three’s - TRIADS
- 10. De Chancourtois Click me grouped the elements in a spiral order divided by a vertical line based on increasing atomic weights
- 11. John Newlands Click me • arranged the known elements in order of atomic weights and observed similarities between the first and ninth elements, the second and tenth elements etc. • proposed the 'Law of Octaves'
- 12. Lothar Meyer Click me • compiled a Periodic Table of 56 elements based on the periodicity of properties such as molar volume when arranged in order of atomic weight.
- 13. Dmitri Mendeleev Click me • arranged the elements in the order of increasing atomic mass (Periodic Table)
- 14. William Ramsay Click me • discovered the Noble Gases.
- 15. Henry Mosely Click me • determined the atomic number of each of the elements. • modified the 'Periodic Law' to read that the properties of the elements vary periodically with their atomic numbers.
- 16. <<<Click me to view the periodic table Click me to view the features of the periodic table >>>
- 17. Click here to take the exam >>>
- 18. Assignment Use the periodic table to identify each of the following sets of elements as part of a group or a period of elements. If the set does not represent a group or a period, write none. a. C, Si, Ge b. Li, Be, B c. P, As, Sb d. O, S, Se e. Ag, Cd, Sn
- 19. References: Phoenix (You and the Natural World Series) Chemistry; Mendoza and Religioso DIWA Companion cd (Science) www.wikepedia.org www.elementsdatabase.com www.ausetube.com