Question

1. Which of the following set of elements is written in order of their increasing
metallic character?
a) Na, Li, k b) C, O, N c) Mg, Al, Si d) Be, Mg, Ca
2. A pair of element that have similar chemical property
a) Li, Mg b) Be, Si c) B, Si d) Na, k

Answer 1

1) d) Be, Mg, Ca

2) a) Li, Mg

Explanation:

1) As we do down in the group metallic character increases so option d i.e Be < Mg < Ca is the correct answer. Ca is more metallic than Be and Mg.  

                     

2) There are elements in the periodic table that show similar properties here Li and Mg have similar chemical properties among all the options.