Question

Assertion : Elements in a group generally possess similar properties but elements along a period have different properties .
Reason : The difference in electronic configuration makes the element differ in their chemical properties along a period.
a. if both assertion and reason are true and the reason is the correct explanation of the assertion.
b. if both assertion and reason are true and the reason is not the correct explanation of the assertion.
c. assertion is true but the reason is false.
d. assertion is false but the reason is true. ​

Answer 1

Answer:

(a) if both assertion and reason are true and the reason is the correct

Answer 2

Answer:

b. both assertion and reason are true and reason is the correct explaination of the assertion

Explanation:properties of elements depends on the outer shell electronic configuration. since it changes across the period but remains same down the group, elements along the period have different chemical and physical properties ( C,N,O,F etc.) and down the group ( H, Li Na etc.) have similar properties