Question 2156
What was Johann Dobereiner primarily known for in the context of the periodic table?
Question 2157
Which property did Mendeleev *not* predict for Eka-aluminium (Gallium) based on the provided table?
Question 2158
What did Mendeleev leave under silicon in his table?
Question 2159
According to Table 3.3, what was the found melting point of Gallium?
Question 2160
What was a key feature of Mendeleev's classification system that set it apart?