Final answer:
The most similar chemical properties are exhibited by lithium (Li), sodium (Na), and potassium (K), which belong to group 1 of the periodic table and are known as alkali metals. These elements are shiny, conduct heat and electricity well, and have a high reactivity, particularly with water. option b is correct
Step-by-step explanation:
option b is correct The elements that exhibit the most similar chemical properties are those in the same group on the periodic table. From the sets given, lithium (Li), sodium (Na), and potassium (K) are all members of group 1, which is known as the alkali metals. These elements share characteristics such as being shiny, good conductors of heat and electricity, and highly reactive, especially with water. They typically form compounds with oxygen in a 2:1 ratio of their atoms to one oxygen atom, and are much more reactive compared to alkaline earth metals like calcium (Ca), strontium (Sr), and barium (Ba).
Among the additional information provided, Fluorine (F), chlorine (Cl), bromine (Br), and iodine (I) are all halogens and exhibit similar properties as well. However, the most similar chemical properties are seen in group 1 elements, which include Li, Na, and K, making option (3) LI, Na, and K the correct choice as they are all alkali metals with similar properties. Furthermore, the other groups provided do not contain elements which are as consistently similar in their properties as group 1 does.