Which is the electronic configuration for oxygen?

1

1s 2s22p!

182282 203

o 182 252 2p4

1s 2s 2p

1s22s22p4

Explanation:

Oxygen is the eighth element with a total of 8 electrons. In writing the electron configuration for oxygen the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for O go in the 2s orbital. The remaining four electrons will go in the 2p orbital. Therefore the O electron configuration will be 1s22s22p4.