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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