C2.2.9 - Developing the Periodic Table Flashcards
1
Q
Who discovered the Periodic Table?
A
Dmitri Mendeleev
2
Q
How did Mendeleev arrange all the elements during his time?
A
In order of increasing atomic weight
3
Q
Why did Mendeleev switch the positions of tellurium and iodine?
A
Because he felt that this matched their chemical properties better
4
Q
Why did Mendeleev leave gaps in the Periodic Table?
A
As he thought that there were elements yet to be discovered
5
Q
In Mendeleev’s first Periodic Table how were groups shown?
A
They were shown as rows
6
Q
How are the elements arranged in the current Periodic Table?
A
In terms of its atom number
