Which of the following has the highest energy electron in the 4p subshell?

Which of the following has the highest energy electron in the 4p subshell?

Step 1: Understand what a subshell is. A subshell is a group of orbitals within an energy level where electrons can be found.
Step 2: Identify the 4p subshell. The '4' indicates the energy level, and 'p' indicates the type of subshell.
Step 3: Know the order of filling electrons in subshells. Electrons fill from lower energy levels to higher ones.
Step 4: Look at the electron configuration of elements in the same period. The elements in the 4p subshell are from the 4th period of the periodic table.
Step 5: Write down the electron configurations of elements in the 4p subshell: Selenium (Se) is [Ar] 4s2 3d10 4p4, while others like Arsenic (As) is [Ar] 4s2 3d10 4p3, and so on.
Step 6: Compare the number of electrons in the 4p subshell for each element. The more electrons in the 4p subshell, the higher the energy.
Step 7: Determine that Selenium (Se) has 4 electrons in the 4p subshell, which is more than Arsenic (3 electrons) and other elements in the same group.
Step 8: Conclude that Selenium (Se) has the highest energy electron in the 4p subshell.

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