Which of the following statements is incorrect?
1) According to the molecular orbital model, when bonding occurs between hydrogen and bromine to make HBr, the 1s orbital of the hydrogen atom no longer exists.
2) For the molecule NO, the molecular orbital model is preferred over the localized electron model because NO contains an unpaired electron.
3) Antibonding electrons are higher in energy than the atomic orbitals from which they came.
4) Electrons in antibonding orbitals will cause a molecule to be paramagnetic.
5) At least two of the above are incorrect.