☰
Classification of Elements and Periodicity in Properties
The important points of distinctions are:
| s-block elements | p-block elements |
| 1. General electronic configuration is ns1-2 | 1. General electronic configuration: ns2 np-1-6 ns2 np -1-6 |
| 2. There are two groups in s-block | 2. There are six groups in p-block. |
| 3. The elements present in this block are all metals. | 3. The elements present in this block are mostly non-metals. |
| 4. They show fixed oxidation state. For example, elements in group 1 show oxidation state of + 1 while those in group 2 show oxidation state of +2. | 4. Most of the members show variable oxidation states i.e. exhibit more than one oxidation state. |
| 5. The compounds are mostly ionic in nature. | 5. The compounds are mostly ionic in nature. |
| 6. They are good reducing agents. | 6. They are generally strong oxidising agents. |
| 7. Most of the elements impart characteristic colours to the flame. | 7. Most of these do not impart colours to the flame. |
Sponsor Area
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?
Sponsor Area
Sponsor Area