Question

observer the following diagram and answer the following question​

Answer 1

Answer:    

Explanation:

    a. X is sodium, Y is lithium    b. Yes they both belong to the same group and the are called as the alkali metal group c. Yes they both belong to the same group 1A or lA                                                                                          

Answer 2

Answer:

a) element x is sodium (Na)

element y is lithium (Li)

b)Yes these elements belong to same group, sodium(Na) and lithium(Li) belongs to 1st group know as alkali group.

c)No, these elements don't belongs to same period, sodium(Na) belongs to 3rd period and lithium(Li) belongs to 2nd period