Question

an element is placed in 2nd group and 3rd period of the periodic table burns in presence of oxygen to form a basic oxide (a) identify the element (b) write the electronic configuration (c) Dram the electron dot structure for the formation of this oxide​

Answer 1

Answer: (a) Magnesium  

(b)  2, 8, 2  

(c) 2Mg+O  

2

​  

→2MgO

(d) MgO+H  

2

​  

O→Mg(OH)  

2

​  

 

Explanation:  Electron dot structure for the formation of magnesium oxide is shown in image:  

Answer 2

Explanation:

(a) Mg ( magnesium)

(b) electronic configuration -

atomic no. of mg is - 12

so it's configuration is 1s2 2s2 2p6 3s2