Early periodic table Flashcards
1
Q
Who created the periodic table
A
Newlands
Mendeleev
2
Q
How did newlands and Mendeleev attempt to order elements
A
Atomic weight order
3
Q
Why were the lists of elements arranged in a table
A
So elements with similar properties are in columns /groups
4
Q
Why is the table called a periodic table
A
Similar properties occur at regular intervals
5
Q
What did the periodic table look like
Was it in the right order
A
Gaps as incomplete
Some elements placed in inappropriate groups if the strict order of atomic weights was followed
6
Q
How did Mendeleev overcome some of the problems
A
By leaving gaps for undiscovered elements
