Question 2191
What significant action by Mendeleev made his Periodic Table famous?
Question 2192
What did Mendeleev rely on heavily to classify elements besides atomic weight?
Question 2193
Who observed a change in the length of the repeating pattern in early periodic studies?
Question 2194
What property did Mendeleev use to arrange elements in his table?
Question 2195
Which elements were discovered after Mendeleev predicted their existence and properties?