An element is placed in 2nd group and 3rd period of the periodic table, burn in presence of oxygen to form a basic oxide : (i) Identify the element (ii) Write the electronic configuration (iii) Write the balanced equation when it burns in the presence of air. (iv) Write a balanced equation when this oxide is dissolved in water. (v) Draw the electron dot structure for the formation of this oxide.

An element is placed in 2nd group and 3rd period of the periodic table

1.	An element is placed in 2nd group and 3rd period of the periodic table, burn in presence of oxygen to form a basic oxide : (i) Identify the element (ii) Write the electronic configuration (iii) Write the balanced equation when it burns in the presence of air. (iv) Write a balanced equation when this oxide is dissolved in water. (v) Draw the electron dot structure for the formation of this oxide.
Answer» Solution :(i) Magnesium. (II) Electronic configuration is 2,8, 2 (iii) `2Mg+O_(2)to2MgO` (iv) `MgO+H_(2)OtoMg(OH)_(2)` (V) `MG toMg^(2+)+2e^(-)` 2,8,22, 8 `O+2e^(-)toO^(-2)` 2,62,8 is electron dot STRUCTURE.