Flash Card
Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in......... .
2/50
In modern periodic table, the number of groups and periods are ......... and ........... respectively.
6/50
According to Mendeleev's periodic law, properties of elements are periodic function of their......... .
9/50
Electronic configuration of element X is 2, 8, 2. It belongs to............ in the modern periodic table.
11/50
According to Mendeleev's prediction, what is the nature of the oxide formed by the element eka-aluminium?
32/50
A student was asked to select two elements in a periodic table. He selects neon and argon. In both these elements, the number of electrons in the outermost shell is......... .
43/50