6. how many groups are there
- 4
- 7
- 5
- 8
- 7
- 6
7. wich side are the non metals on
- right
- left
8. whats the name of the man who noticed that there were groups in the elements where they have similar properties
- wolfkapp
- Dobereiner
- newland
- mendeleeves
9. when were most of the elements we know today eventualy known
- end of 1800
- mid 1900
- begining of 1900
- mid 1800
10. what element did they compare the weight of atoms with in the process relative ato ic mass in 1800
- nitrogen
- helium
- hydrogen
- lithium
