Question

Name the Elements which have the following electronic configurations :

1. 2, 6
2. 2, 7
3. 2, 8, 1
4. 2, 8, 7
5. 2, 8
6. 2, 4

Answer 1

We know, Atomic number = Number of Total Protons = Number of Total Electrons in neutral atom

Hence, Sum of electrons from all the shells will give the Atomic number of that element

1. Atomic number = 2 + 6
   Atomic number = 8.
   Atomic number of Oxygen is 8
   Thus, 2,6 Represents the Configuration of Oxygen
2. Atomic number = 2 + 7
   Atomic number = 9
   .Atomic number of Fluorine is 9.
   Thus, 2,7 Represents the Configuration of Fluorine.
3. Atomic number = 2 + 8 + 1
   Atomic number = 11
   .Atomic number of Sodium is 11
   Thus, 2,8,1 Represents the Configuration of Sodium.
4. Atomic number = 2 + 8 + 7
   Atomic number = 17
   .Atomic number of Chlorine is 17
   Thus, 2,8,7 Represents the Configuration of Chlorine.
5. Atomic number = 2 + 8
   Atomic number = 10
   .Atomic number of Neon is 10
   Thus, 2,8 Represents the Configuration of Neon
6. Atomic number = 2 + 4
   Atomic number = 6
   .Atomic number of Carbon is 6
   Thus, 2,4 Represents the Configuration of Carbon..