THE PERIODIC TABLE OF ELEMENTS ~ 1869 ~ PERFECTION
MENDELEEV published Periodic
Table of the Elements in 1869
Others tried before ~ others afterwards
To Write & Refine ~ but it was PERFECT !
Horizontal progression from METAL ~
SODIUM to NON-METAL ~ CHLORINE
Which combined to form SALT ~ NaCl
And vertical columns (GROUPS) which contained
Families of ELEMENTS like HALOGENS
FLUORINE ~ CHLORINE ~ BROMINE ~ IODINE and
ALKALI METALS ~ Li ~ Na ~ K !
He recognised TRANSITION ELEMENTS
And left gaps for UNKNOWN ELEMENTS
And even predicted their PROPERTIES !
Thanks for visiting ~ comments welcome ~ Love B & A XOX
The PERIODIC TABLE of ELEMENTS now unifies all 92
natural elements ~ HYDROGEN to URANIUM and also
acomodates the TRANSURANIC ELEMENTS of which one
No. 101 is named MENDELEEVUM. I love to teach students
(and SENIORS !) the History of Chemistry and the People
involved ! MENDELEEV is a Pure Genius because we have
to remember he constructed his AMAZING TABLE when
only 63 elements were known and before the discovery
of ELECTRON (1897) PROTON (1909) & NEUTRON (1932) and Noble
Gasses (1901) which form a complete GROUP (HELIUM ~ NEON
etc). MENDELEEV based his TABLE on ascending ATOMIC
WEIGHTS it is now based on ATOMIC NUMBERS ~ The
number of PROTONS in the NUCLEUS. One of the lovely
stories about MENDELEEV is that he travelled from MOSCOW
to PARIS in 1906 and knocked on the CURIES DOOR and said
\"Hello I\'m MENDELEEV I\'ve come to thanks you for discovering
RADIUM ~ which I called EKA-BARIUM ~ and filling in another
GAP in my PERIODIC TABLE ~ Beautiful ~ AMEN !
This POEM is presented as a BLANK VERSE (iambic pentameter)
4 7 3 Sonnet. It\'s dedicated to the Genius of DIMITRI MENDELEEV