Question

you can resize the interactive by slowly dragging the dashed lines to the right of the interactive.having problems staying logged in or are you experiencing issues? please visit our troubleshooting section for solutionsidentify the complete electron configuration for an atom ofthe element selenium (se):tap an option to select or deselect an answer.$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2}4p^{4}LXB01s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{6}4p^{4}LXB11s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}4d^{10}4p^{4}$student name:guestactivity:masterprogress report#1 #2 #3#4 #5 #6tap for question-specific helphelp me!view directionsto main menu

Explanation:

Step1: Find Selenium's atomic number

Selenium (Se) has an atomic number of 34, so it has 34 electrons.

Step2: Follow Aufbau Principle

Fill orbitals in order: $1s \to 2s \to 2p \to 3s \to 3p \to 4s \to 3d \to 4p$.

• $1s^2$ (2 electrons, total=2)
• $2s^2$ (2 electrons, total=4)
• $2p^6$ (6 electrons, total=10)
• $3s^2$ (2 electrons, total=12)
• $3p^6$ (6 electrons, total=18)
• $4s^2$ (2 electrons, total=20)
• $3d^{10}$ (10 electrons, total=30)
• $4p^4$ (4 electrons, total=34)

Step3: Verify correct order

Orbitals are written by increasing principal quantum number, so $3d^{10}$ comes after $4s^2$ in the configuration.

Answer:

1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁴