For p-block elements forming cations, electrons are removed from which orbitals first?

1. The order of removal differs between blocks of the periodic table. 2. For the transition metals, electrons are removed from the s orbital first and then from the d orbital. 3. For the p-block elements, electrons are removed from the p orbitals and then from the s orbital. 4. So the highest energy occupied orbital empties first in each case. 5. Chromium, being a transition element, should lose its s electrons and then its d electrons. _Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 7 'Chemical Bonding and Molecular Geometry', sections 7.1-7.6_