The increasing order of the first ionization enthalpies of the elements B, P, S and F (lowest first) is
F < S < P < B
P < S < B < F
B < P < S < F
B < S < P < F
D.
B < S < P < F
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?
To which block the element with outer electronic configuration 4s23d10 belongs?
Why are there 10 elements in each series of d-block?
In terms of electronic configuration,
what is common in a given period and group?
Mock Test Series
