Alk aline earth metal (A), belongs to 3rd period reacts with oxygen and nitrogen to form compound (B) and (C) respectively. It undergo metal displacement reaction with AgNO_3 solution to form compound (D).

Alk aline earth metal (A), belongs to 3rd period reacts with oxygen an

1.	Alk aline earth metal (A), belongs to 3rd period reacts with oxygen and nitrogen to form compound (B) and (C) respectively. It undergo metal displacement reaction with AgNO_3 solution to form compound (D).
Answer» Solution :(i) An alkaline earth (A) metal belongs to third period is magnesium (Mg) (ii) Magnesium REACTS with oxygen to form magnesium oxide (MgO) (B) `2Mg +O_(2)tounderset(Magnesium oxide)(2MgO_(2))` (iii) Magnesium reacts with NITROGEN to form magnesium nitride `Mg_(3)N_(2)(C)` `3Mg+N_(2)O_(2)tounderset("Magnesium nitride")(Mg_(3)O)` (iv) Magnesium UNDERGOES metal displacement reaction with `AgNO_(3)` solution to form magnesium nitrate `Mg(NO_(3))_(2) (D)` `Mg+2AgNO_(3) tounderset("Magnesium nitrate") (Mg(NO_(3))_(2) +)2AG`