Question

The Representative elements consist of:
A. some metals, all non-metal and metalloids
B. some metals, some non-metal and metalloids
C. some metals and all non-metals
D. all metals, non-metals and metalloids

Answer 1

. The elements which belong to the s and p block are known as representative elements. The s-block majorly contains all metals, and p-block contains mainly the non-metals and metalloids.

Complete step by step answer:
The elements of s-block and p-block are known as representative elements as their outer shells are not completely filled and either they lose electrons (in case of metals) or they gain electrons (in case of non-metals) to gain stability.
Since these elements are very reactive therefore, they are hardly found in their natural state as most of the time they will be reacting with air and water. The alkali metals or Group-1 elements react vigorously with non-metals except the halogens.
Elements of s-block are known as metals as they have the capacity to lose electrons rather than gaining. For example, Beryllium, Magnesium, Calcium, Strontium etc.
Elements in the p-block are different such as Boron is the 13th group is a metalloid, a metalloid is an element which exhibits properties both of metal and non-metal as well.
Non-metals are also part of p-block such as Carbon, Oxygen, Silicon etc. these elements gain electrons rather than losing them to fill their octet.
The representative elements are chosen when the last filling electron or the valence electron get filled in s or p shells. That’s the elements of d-block are not included from Group 3 – Group 12 as the last valence electron ends up in d-shell and hence, they are called as transition elements because they exhibit large no. of oxidation states.
Hence, the answer to this question is A. some metals, all nonmetals and metalloids.
So, the correct answer is “Option A”.

Note: The elements which are in the 7th period are generally not referred to as representative elements such as Francium, Radium, Flerovium as they are radioactive elements and do not react with any other element in general.