Question

What energy level is the last electron for bismuth, Bi, in?

Option 1: 4
Option 2: 5
Option 3: 6
Option 4: 7

Answer 1

The last electron for bismuth, Bi, is in energy level 6, based on the periodic table and the electron configuration of bismuth which ends with 6p³.

Step-by-step explanation:

The question is concerned with identifying the energy level of the last electron in a bismuth (Bi) atom. Bismuth has the atomic number 83, which means it has 83 electrons. According to the periodic table and the Aufbau principle, the electrons in an atom fill the lowest available energy levels before filling higher levels. The electron configuration of bismuth ends with 6p³, indicating that the outermost electrons are in the 6th energy level. Therefore, the last electron for bismuth is in energy level 6.