Question
Name two ions which are iso-electronic with Ar (Z = 18).
Solution
K+, Ca2+ are isoelectronic ions.
Name two ions which are iso-electronic with Ar (Z = 18).
Give the ‘liquid elements’ in the periodic table.
What is valency of an element?
Gallium was named by Mendeleev as
What are magic numbers?
Which property is the basis of long form of periodic table?
How many elements are placed in each period of the p-block?
What is the number of groups in: (i) p-block (ii) d-block?
How many elements are present in:
(i) second period
(ii) fourth period
(iii) sixth period?
What is the name given to the s-block elements?
Mock Test Series
