Question

which of the following electronic configuration are wrong and why? (a) 2,8,2 (b) 2,8,8,2 (c) 2,8,9,1​

Answer 1

Answer:

2 8 9 1

more than 8 element in orbit III so it is wrong

Answer 2

2,8,9,1 electronic configuration is wrong (option - c)

• The K,L,M,N orbitals are filled by electrons in an element according to the atomic number of the element.
• Octet means 8 electrons in an orbital implies a fully filled orbital.
• More than 8 electrons cannot be filled in an orbital.
• So 9 cannot be filled in orbital M.
• It should have been 2,8,8,2.