C2.1 DMITRI MENDELEEV Flashcards
1
Q
what did he develop
A
the first modern periodic table
2
Q
first ordered them in what
A
increasing atomic weights
3
Q
why did he switch some elements
A
so they fit the pattern of other elements in the same group
4
Q
left gaps for what
A
undiscovered elements
5
Q
elements with what lined up in what
A
similar properties in groups
