Which pair of elements do you expect to be most similar? Why?
(a) Ti and Ga
(b) N and O
(c) Li and Na
(d) Ar and Br
(e) Ge and Ga
Solution 68P
Elements lying in the same group have similar properties and elements lying in different groups have different properties
Li and Na is found in the same group(group 1) and hence will have similar properties. No other element pairs are found in the same group
Hence the right answer is ( c )