Question

Which of the following are correct? Electrons generally occupy the lowest energy orbital first. The C atom has two unpaired electrons. The He atom has two electrons that have parallel spin in its 1s orbital. The arrangement of the orbitals is the same in a multielectron atom and a single-electron atom. In the Li atom, the 3s, 3p, and 3d orbitals have different energies. The He atom has one electron each in 1s and 2s orbitals.

Answer 1

Answer:

Options: 1, 2, 3 and 5 are correct

Explanation:

1. As per the Aufbau priciple, electrons go into the subshell having the most minimal conceivable energy.  
2. By Hund's standard, the electron arrangement of carbon, which is $1s^{2}\ 2s^{2}\ 2p^{2}$, in this manner the carbon particle contains two unpaired electrons.  
3. Electrons can never have parallel turn in s-orbitals. If there should be an occurrence of Helium, it has 2 electrons with parallel turn in its 1s orbital.  
4. The plan of the orbitals in a multi electron molecule is not quite the same as the course of action in a solitary electron particle inferable from the electron-electron shocks in a multi electron iota.  
5. In the Li particle, the 3s, 3p, and 3d orbitals have various energies.  
6. Helium has 2 electrons during the 1s orbital and none during the 2s.