Which one of the following electrons in the ground state will have least amount of energy?
1. | An electron in hydrogen atom. |
2. | An electron in 2p orbital of carbon atom. |
3. | The electron of copper atom present in 4s orbital. |
4. | The outermost electron in sodium atom. |
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is:
1. 5f > 6p > 4d > 5p
2. 5f > 6p > 5p > 4d
3. 6p > 5f > 5p > 4d
4. 6p > 5f > 4d > 5p