1.

Complete the table given below analyze the change in the electronic arrangement of elements during the formation of each compound. Find how they are related to valency.  Compound Constituent elements Atomic numberElectron configurationNo. of electrons donated accepted/ shared NaCl  Na 11 ...... 1  Cl 17 ...... .... MgO  Mg 12 ..... 2 O  8 ..... ....HF H 1 .... 1 F .... 2,7 ....... CCl4 C 6 .... 4Cl .... 2,8,7 ......

Answer»
  Compound Constituent elements Atomic numberElectron configurationNo. of electrons donated accepted/ shared
 NaCl  Na 11 2,8,1 1
  Cl 17 2,8,7 1
 MgO  Mg 12 2,8,2 2
 O  8 2,6 2
HF H 1 1 1
 F 9 2,7 1
 CCl4 C 6 2,7 4
Cl 17 2,8,7 1


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