question_answer 82)

The bromine atom possesses 35 electrons. It contains 6 electrons in 2p-orbitals; 6 electrons in 3p-orbitals and 5 electrons in 4p-orbitals. Which of these electrons experiences the lowest effective nuclear charge?  

Answer:

The electrons farthest from nucleus experience lowest effective nuclear charge. Thus, 4p electrons will experience lowest effective nuclear charge.