The Early Periodic Table Flashcards
1
Q
Which 2 scientists attempted to classify the elements?
A
Newlands and Mendeleev
2
Q
How did they classify elements?
A
In order of their atomic weights
3
Q
What are the columns known as?
A
Groups
4
Q
What do elements in the same group have?
A
Similar properties
5
Q
Why is it called the Periodic Table?
A
Because similar properties occur at regular intervals
6
Q
Where were some elements placed?
A
In inappropriate groups
7
Q
When were elements placed in inappropriate groups?
A
If the strict order of atomic weights was followed
8
Q
How did Mendeleev overcome some of the problems?
A
Leaving gaps for elements he thought had not yet been discovered
