The periodic table of elements

Development of the periodic table of elements

1. 1

2. 2

3. 4

4. 5 patterns regularities symmetries

5. 6 understandable meaningful useful

6. 7 The P eriodic T able of Elements

7. H ow did the periodic table develop? W hat information can be obtained from this organizing tool?

8. H ow did the periodic table develop? W hat information can be obtained from this organizing tool?

9. T he P eriodic T able of Elements - is an arrangement of elements based on specific characteristics and properties.

10. ATOMIC MASS

11. ATOMIC MASS ELECTRON NUMBER

12. ATOMIC MASS ELECTRON NUMBER ELECTRON CONFIGURATION

13. ATOMIC MASS ELECTRON NUMBER ELECTRON CONFIGURATION CHEMICAL PROPERTIES

14. - the development could be traced back in 1817 to the work of Johann Dobereiner

15. - a G erman C hemist who formed the Triads of Elements with similar properties, like the triad of C alcium, Barium and Strontium.

16. I n 1863 , John N ewlands , an E nglish C hemist proposed the Law of Octaves .

17. He based his classification of elements on the fact that similar properties could be noted for every eight element when they are arranged in order of increasing atomic masses.

18. The Periodic Table of Elements is the visual representation of the Periodic Law .

19. P eriodic L aw states that “ If elements are arranged according to their atomic mass, it shows regular variation.

20. DMITRI MENDELEEV LOTHAR MEYER

21. L ater, in 1914, Henry M oseley , an E nglish P hysicist observed that the order of the x-ray frequencies emitted by elements follows the ordering of the elements by atomic number .

22. T he M odern P eriodic L aw which states that “ the properties of elements vary periodically with atomic number ”.

23. A tomic number - is equal to the number of protons in the nucleus of an atom.

24. E lements are arranged according to increasing atomic number. T he P eriodic T able consists of 118 elements and is represented by symbols

25. T he symbols of elements are base on the first letter of the element`s name or the first two letters of it. Element symbol

26. Element symbol T he first letter of the symbol will be capitalized , while the second letter, written by a small letter.

27. Copper wire

28. Copper wire it stands for Cuprum , which is the L atin word for Copper .

29. A tomic number

30. A tomic number Atomic mass

31. T he vertical columns of the modern periodic table are called groups.

32. Modern Periodic Table 18 groups M endeleev’s T able 8 groups

33. ALKALI METALS 1

34. ALKALI METALS ALKALINE EARTH METALS 1 2

35. ALKALI METALS ALKALINE EARTH METALS 1 2 17 HALOGENS

36. ALKALI METALS ALKALINE EARTH METALS 1 2 17 HALOGENS NOBLE GASES 18

37. ALKALI METALS ALKALINE EARTH METALS 1 2 17 HALOGENS NOBLE GASES 18 13 14 15 16

38. ALKALI METALS ALKALINE EARTH METALS 1 2 17 HALOGENS NOBLE GASES 18 13 14 15 16 BORON GROUP

39. ALKALI METALS ALKALINE EARTH METALS 1 2 17 HALOGENS NOBLE GASES 18 13 14 15 16 BORON GROUP CARBON GROUP

40. ALKALI METALS ALKALINE EARTH METALS 1 2 17 HALOGENS NOBLE GASES 18 13 14 15 16 BORON GROUP CARBON GROUP NITROGEN GROUP

41. ALKALI METALS ALKALINE EARTH METALS 1 2 17 HALOGENS NOBLE GASES 18 13 14 15 16 BORON GROUP CARBON GROUP NITROGEN GROUP OXYGEN GROUP

42. colorless, odorless gases, such as Neon (ne)

43. They are very reactive solids . T hey react explosively with water .

44. The horizontal rows of the Modern P eriodic T able are called periods . They are numbered from top to bottom. There are 7 horizontal periods in the Periodic T able.

45. ALKALI METALS ALKALINE EARTH METALS 1 2 17 HALOGENS NOBLE GASES 18 13 14 15 16 BORON GROUP CARBON GROUP NITROGEN GROUP OXYGEN GROUP 3 4 5 6 7 8 9 10 11 12 TRANSITION ELEMENTS

46. ALKALI METALS ALKALINE EARTH METALS 1 2 17 HALOGENS NOBLE GASES 18 13 14 15 16 BORON GROUP CARBON GROUP NITROGEN GROUP OXYGEN GROUP 3 4 5 6 7 8 9 10 11 12 TRANSITION ELEMENTS LANTHANIDES ACTINIDES

47. ALKALI METALS ALKALINE EARTH METALS 1 2 17 HALOGENS NOBLE GASES 18 13 14 15 16 BORON GROUP CARBON GROUP NITROGEN GROUP OXYGEN GROUP 3 4 5 6 7 8 9 10 11 12 TRANSITION ELEMENTS LANTHANIDES ACTINIDES INNER TRANSITION ELEMENTS

48. Elements from the taller columns (groups 1, 2, and 13 through 18) are called the representative elements or main groups of the periodic table. Representative elements or main groups

49. METALS

50. METALS NONMETALS

51. METALS NONMETALS METALLOIDS

52. NONMETALS Nonmetals are confined to the right side of the table.

53. NONMETALS Nonmetals are confined to the right side of the table. Metalloids have the appearance and some properties of a metal but behave like a nonmetal in certain instances.

54. Elements change from metals , to metalloids to nonmetals.

55. T he P eriodic T able serves as a road map in our journey in Chemistry .

56. T he P eriodic T able serves as a road map in our journey in Chemistry .