periodic table Flashcards
1
Q
how does the group number help
A
the group number shows how many electrons are there in the outer shell
2
Q
how do the rows help
A
the number of the row of the element shows how many shells there would be
3
Q
What did Dobereiner do for the periodic table
A
grouped elements based on similar properties
4
Q
what did john Newlands do
A
put elements in atomic mass order
law of octaves
5
Q
what did Dmitri Mendeleev
A
- left gaps for future elements
- grouped elements with similar chemical properties
6
Q
A
