Periodic Table History Flashcards
1
Q
Who introduced the idea of a periodic table arrangement
A
Mendelev
2
Q
how did Mendelev order elements
A
In atomic weight from left to right
3
Q
what did Mendelev do that made him famous
A
left gaps for elements which weren’t discovered yet
4
Q
why did he leave gaps
A
properties of different elements didn’t fit into the groups
5
Q
what two elements did Mendelev not order due to weight
A
Tellurium and Iodine - he did it with properties and was proven right
