(a) Name an element whose properties were predicted on the basis of its position in Mendeleev's periodic table.
(b) Name two elements whose atomic weights were corrected on the basis of their positions in Mendeleev's periodic table.
(c) How many elements were known at the time of Mendeleev's classification of elements ?
An element occurring in the bcc structure has unit cells.
The total number of atoms of the element in these cells will be
An element has two isotopes with atomic masses 17 and 18, occurring in the nature in ratio 1:1. What is the atomic weight of the element?