Question

Two elements x and y have atomic number 12 and 16 respectively .To which period of the mprdern periodic table do theses two elements belong

Answer 1

Answer:

Explanation:

x=period 2,group3 as it last shell has 2 electrons,group 3 as there are 3 shells

y=period16,group3 as it last shell has more than2 electrons add 10 to the valence electrons,group 3 as there are 3 shells