Assume that Pauli's exclusion principle can permit three electrons per orbital rather than two. The correct statement(s) is/are:

Options

1. A9 electrons are needed in the outermost shell for a noble gas configuration.
2. B3 electrons would be shared in a covalent bond.
3. CThe electron dot structure of an element X with Z=12 is X :
4. DAssuming MO diagram of N ₂ is valid for X ₂(Z=12) , the bond order of X ₂ is 2 .