Question

Two elements X and Y have atomic numbers 12 and 16 respectively. To which period of
the modern periodic table do these two elements belong? What type of bond will be
formed between them and why? Also give the chemical formula of the compound
formed.​

Answer 1

Explanation:

according to the formula of 2n², element x (which has the atomic number of 12) has 2 electrons in it's outermost shell and element y (having the atomic number of 16) has 6 electrons in it's outermost shell. both the elements have 3 shells so they are the members of third period as periods indicate the number of shells. On the reaction, 2 electrons of element x will be completely transferred to element y to form ionic bond.

element x having the atomic number 12 is magnesium and element y having the atomic number of 16 is sulphur so their compound will be named as magnesium sulphide (MgS)