There are three elements X, Y and Z having atomic numbers of 6, 16 and 19 respectively. Based on this information, Het has been asked to answer the following questions: In which group of the periodic table would you expect to find (i) element x (ii) element Y and (iii) element z?

There are three elements X, Y and Z having atomic numbers of 6, 16 and

1.	There are three elements X, Y and Z having atomic numbers of 6, 16 and 19 respectively. Based on this information, Het has been asked to answer the following questions: In which group of the periodic table would you expect to find (i) element x (ii) element Y and (iii) element z?
Answer» Solution :In ORDER to ANSWER these questions, Het first wrote down the electronic configurations of the ELEMENTS X, Y and Z by using their atomic numbers, as follows: (1) (i) Element X has 4 valence electrons in its atom, so it will be placed in group 4 + 10 = 14 of the modern periodic table. (II) Element Y has 6 valence electrons in its atom, so it will be placed in group 6 + 10 = 16 of the modern periodic table. (iii) Element Z has 1 valence electron in its atom, so it will be placed in group 1 of the modern periodic table.