The Modern Periodic Table Flashcards
1
Q
When were electrons, protons and neutrons discovered?
A
Early 20th Century
2
Q
After the discovery, how were elements arranged?
A
In order of atomic numbers
3
Q
When this was done, what were elements placed in?
A
Appropriate groups
4
Q
What do elements in the same group have?
A
Same number of electrons in their outer shell
5
Q
What can the modern day table be seen as?
A
An arrangement of elements in terms of their electronic structures
