Six elements of periodic table A, B, C, D, E and F have atomic numbers of 2, 12, 20, 18, 4 and 10 respectively (where A, B, C, D, E and F are not the chemical symbols of these elements). Based on this information, answer the following questions : Which of these elements are (i) metals and (ii) non-metals ?

Six elements of periodic table A, B, C, D, E and F have atomic numbers

1.	Six elements of periodic table A, B, C, D, E and F have atomic numbers of 2, 12, 20, 18, 4 and 10 respectively (where A, B, C, D, E and F are not the chemical symbols of these elements). Based on this information, answer the following questions : Which of these elements are (i) metals and (ii) non-metals ?
Answer» Solution :FIRST of all, write the ELECTRONIC configurations of all the given SIX elements as follows: (3) (i) Elements B, C and E belonging to group 2 are metals. (ii) Elements A, D and F belonging to group 18 are non-metals (noble gases).