33
/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 1, 2025
3759160
344855
2
Public Timelines
FAQ Get premium

jan 1, 1864 - Newlands The known elements (>60) were arranged in order of atomic weights and observed similarities between the first and ninth elements, the second and tenth elements etc. He proposed the 'Law of Octaves'.

Added to timeline:

Date:

jan 1, 1864
Now
~ 161 years ago