Which is not true?
A)Mendeleev ended each row in his periodic table with an inert gas.
B)Mendeleev left gaps in his periodic table for undiscovered elements.
C)Mendeleev ordered the elements in his periodic table by atomic weight.
D)Mendeleev's periodic table predated the concept of electron configuration.

Question

Quizplus · Accepted Answer

Mendeleev did not know about inert gases when he created his periodic table. Inert gases were discovered later and added to the periodic table as a new group.

Which Is Not True