Which of the following is incorrect?
1. The main credit for classifying elements goes to Johann Wolfgang Döbereiner.
2. The early development of a Periodic Table of elements was created through the arrangement of elements on the basis of their fundamental property, the atomic mass, and also on the similarity of chemical properties.
Choose the correct code:
1
Both 1 and 2
2
Neither 1 and 2
3
Only 1
4
Only 2