https://padlet.com/Unsurealpranesh/h4c10f55kxxhvxkv Made with serendipity en-us 2020-10-08 10:18:06 UTC 2026-03-23 17:16:08 UTC hello@padlet.com Unsurealpranesh https://padlet.com/Unsurealpranesh/h4c10f55kxxhvxkv/wish/813274620 John Dalton
Table of elements
In 1803, the English school teacher and part-time scientist, John Dalton published his first list of elements when he printed his atomic theory and his early gas law work. His original list showed only five elements: hydrogen, oxygen, azote (nitrogen), carbon and sulfur, along with their atomic weights.]]> 2020-10-08 10:25:29 UTC https://padlet.com/Unsurealpranesh/h4c10f55kxxhvxkv/wish/813274620 Unsurealpranesh https://padlet.com/Unsurealpranesh/h4c10f55kxxhvxkv/wish/813274760 Johan Döbereiner
Law of Triads
A triad is a grouping of three elements in order of atomic mass. Döbereiner’s Law of Triads deals with putting three elements in order of atomic weight.]]> 2020-10-08 10:25:36 UTC https://padlet.com/Unsurealpranesh/h4c10f55kxxhvxkv/wish/813274760 Unsurealpranesh https://padlet.com/Unsurealpranesh/h4c10f55kxxhvxkv/wish/813275032 John Newlands 
Law of octaves
An English scientist called John Newlands put forward his Law of Octaves in 1864. He arranged all the elements known at the time into a table in order of relative atomic mass. ... For example, starting at Li (lithium), Be (beryllium) is the second element, B (boron) is the third and Na (sodium) is the eighth element.]]> 2020-10-08 10:25:49 UTC https://padlet.com/Unsurealpranesh/h4c10f55kxxhvxkv/wish/813275032 Unsurealpranesh https://padlet.com/Unsurealpranesh/h4c10f55kxxhvxkv/wish/813279420 Dimitri Mendeleev 
Periodic table
The periodic table is organized like a big grid. Each element is placed in a specific location because of its atomic structure. As with any grid, the periodic table has rows (left to right) and columns (up and down). Each row and column has specific characteristics.]]> 2020-10-08 10:29:11 UTC https://padlet.com/Unsurealpranesh/h4c10f55kxxhvxkv/wish/813279420