Which one of the following is a correct electronic configuration of sodium?

Which of the following is the correct electronic configuration of potassium ?

Which one of the following shows the correct electronic configuration of the outermost shell in inert gases ?

Gadolinium belongs to 4f series. It's atomic number is 64. Which of the following is the correct electronic configuration of gadolinium ?

Gadolinium belongsd to 4f series. It's atomic number is 64. which of the following is the correct electronic configuration of gadolinium ?

Gadolinium belongsd to 4f series. It's atomic number is 64. which of the following is the correct electronic configuration of gadolinium ?

Which of the following is the correct electronic configuration of Fe^(3+) ion ? (Z for Fe = 26)

Which of the following is the correct electronic configuration in octahedral complex with d^4 configuration?

Which one of the following represents the electronic configuration of the most electropositive element?

Which of the following is a one electron species ?

The correct electronic configuration of lanthanum is