Hey guys im doing an assighnment on the periodic table and i need help with the following questions
1) What are the two ealier key discoveries that lead to the periodic table?
2) When Mendeleev made the perisodic table he knew nothing of electrons so how did he establish these patterns?
3) What are some earlier schemes of classification before the periodic table
4) Why was Mendeleev's system superior to these older version
5) What changes have been made to the periodic table since since its creation in 1869
Thank you so much for all and any help.
1) What are the two ealier key discoveries that lead to the periodic table?
2) When Mendeleev made the perisodic table he knew nothing of electrons so how did he establish these patterns?
3) What are some earlier schemes of classification before the periodic table
4) Why was Mendeleev's system superior to these older version
5) What changes have been made to the periodic table since since its creation in 1869
Thank you so much for all and any help.