Development Of The Perodic Table Flashcards
1
Q
B4 atomic structure was discovered what was used to order elements
A
Atomic weight
2
Q
What were the elements grouped in Mendeleev table of elements
A
Grouped usin their properties instead of strictly following atomic weight
3
Q
Why did Mendeleev leve gaps
A
To keep the groups together and now these gaps are filled with elements discovered later
4
Q
Why did mendeleev swap some elements round in places
A
Becus at places where ordering in atomic weight didn’t fit the pattern
5
Q
Now what is the group number based on
A
The number of electrons on the outer shell
6
Q
Now what’s the period number bout
A
The number of shells with electrons in
7
Q
What are the elements ordered in now
A
The increasing atomic number
