C1: HISTORY OF THE PERIODIC TABLE Flashcards
1
Q
How were early periodic tables arranged?
A
in order of atomic weight
2
Q
What was wrong with early periodic tables?
A
some elements were placed in the wrong group
3
Q
What did Mendeleev do to fix the problems with the early periodic table?
A
-left gaps for undiscovered elements
-swapped elements around so that elements were grouped by similar properties
4
Q
Why was Mendeleev’s periodic table accepted?
A
Mendeleev correctly predicted properties of undiscovered elements
