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Periodic Table

4 th Lykeion of Corfu. Class A. Periodic Table. 3-ades of elements with similar properties. Dobereiner 1829. Br ,. I. Cl ,. Ca ,. Sr,. Ba. etc. Rule of “Octaves”. Newlands 1863. 1. 2. 3. 4. 5. 6. 7. 7 Li. 9 Be. 10 B. 12 C. 14 N. 16 O. 19 F. 20 Ne. 8. 23 Na. 24 Mg.

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Periodic Table

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  1. 4th Lykeion of Corfu Class A Periodic Table

  2. 3-ades of elements withsimilar properties Dobereiner 1829 Br, I Cl, Ca, Sr, Ba etc.

  3. Rule of “Octaves” Newlands 1863 1 2 3 4 5 6 7 7Li 9Be 10B 12C 14N 16O 19F 20Ne 8 23Na 24Mg 27Al 28Si 31P 32S 35Cl 36Ar …… 39K 40Ca

  4. Newlands

  5. Dmitri Mendeleev 1869 Lothar Meyer If all the elements be arranged in order of their atomic weights a periodic repetition of properties is obtained." - Mendeleyev

  6. ? Known elements when the Mendeleev’s table established 129Te 127Ι ?

  7. 1874 -1885 Discovery of Gallium(Ga),Germanium(Ge) και Scandium (Sc) Their properties were almost expectable !

  8. Henry Moseley 1913 The elements may be arranged in order of their Atomic Numbers and not to their Atomic weights 7Li 3Li 9Be 4Be 10B 5B 12C 6C 14N 7N 16O 8O 19F 9F 20Ne 10Ne “There is in the atom a fundamental quantity which increases by regular steps as we pass from each element to the next. This quantity can only be the charge on the central positive nucleus.”

  9. O Mass Number 16 8 Atomic Number

  10. ΙΑ ΙΙΑ ΙΙΙΑ ΙVΑ VΑ VIΑ VIIΑ VIIIΑ 1st 2nd VIIIB 3rd ΙΙΙB ΙVB VB VIB VIIB ΙB ΙΙB 4th 5th 6th 7th Groups : 18 Contemporary P.T. Periods : 7

  11. Groups : The VERTICAL columns Elements within a group have similar properties

  12. Group ΙΑ ( 1st) orALKALI METALS 3Li K2 L1 11Na K2 L8 M1 19K K2 L8 M8 N1 37Rb K2 L8 M18 N8 O1 55Cs K2 L8 M18 N18 O8 P1 87Fr K2 L8 M18 N32 O18 P8 Q1

  13. Group ΙIΑ ( 2nd ) orALKALINE EARTH METALS 4Be K2 L2 12Mg K2 L8 M2 20Ca K2 L8 M8 N2 38Sr K2 L8 M18 N8 O2 56Ba K2 L8 M18 N18 O8 P2 87Ra K2 L8 M18 N32 O18 P8 Q2

  14. GroupVΙIΑ ( 17th ) orHALOGENS 9F K2 L7 17Cl K2 L8 M7 35Br K2 L8 M18 N7 53I K2 L8 M18 N18 O7 85At K2 L8 M18 N32 O18 P7

  15. GroupVIΙIΑ or (O) or 18thNOBLE GASES 2He K2 10Ne K2 L8 18Ar K2 L8 M8 36Kr K2 L8 M18 N8 54Xe K2 L8 M18 N18 O8 86Rn K2 L8 M18 N32 O18 P8

  16. Transition Metals …. 21Sc K2 L8 M9 N2 22Ti K2 L8 M10 N2 …. 39Y K2 L8 M18 N9 O2 40Zr K2 L8 M18 N10 O2

  17. Rare Earths ( Lanthanides & Actinides )

  18. The horizontal rows of the periodic table are called PERIODS. 37Rb K2 L8 M18 N8 O1 38Sr K2 L8 M18 N8 O2 39Y K2 L8 M18 N9 O2 ………………

  19. Noble Gases Alkali Metals Main Groups Alkaline Earth Metals Halogens Transition Metals Main Groups Lanthanides & Actinides Periodic Table

  20. 1 2 3 10 11 18 19 36 37 54 55 86 87

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