One of the defects of Mendeleeff’s periodic table is that:
A. halogens are placed in the same group
B. on its basis properties of known elements cannot be predicted
C. elements of dissimilar properties are placed in the same group
D. periodic table is not based on any fundamental principle.
Answer:C
One of the defects of Mendeleeff’s periodic table is that:
A. halogens are placed in the same group B. on its basis properties of known elements cannot be predicted C. elements of dissimilar properties are placed in the same group D. periodic table is not based on any fundamental principle.