49 CHEMICAL ELEMENT ATOMIC NUMBER 90, CHEMICAL ELEMENT NUMBER ATOMIC 90
*** 462 chemical element atomic number 90 939 ***
![atomic number chemical element 90 Periodic coloured Table [1] with Groups Periods Elements and of](https://harmoniaphilosophica.files.wordpress.com/2011/04/2000px-periodic_table-svg.png "atomic number chemical element 90 Periodic coloured Table [1] with Groups Periods Elements and of")
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