Development Of The Periodic Table Flashcards
1
Q
In the early 1800s what were elements arranged as ?
A
In the early 1800s elements were arranged by atomic mass
2
Q
Until quite recently, there were two obvious ways to categorise elements :
A
By their physical and chemical properties
Their relative atomic mass
3
Q
Why were gaps left in the table ?
A
Gaps were left in the table to make sure that the elements with similar properties stayed in the same group
4
Q
Where are metals found on the periodic table ?
A
Metals are found on the left of the periodic table
5
Q
Where are the non metals found in the periodic table ?
A
Non metals are found to the right of the periodic table
6
Q
What does the group number of the periodic table show ?
A
The group number tells you how many electrons are on the outer shell
