Question

arsenic
express your answer in complete form, in order of increasing orbital. for example, 1s²2s² would be entered as 1s^22s^2.

Explanation:

Step1: Determine atomic number of arsenic

Arsenic has atomic number 33.

Step2: Fill orbitals according to Aufbau principle

1s is filled first with 2 electrons (1s^2), then 2s with 2 electrons (2s^2), 2p with 6 electrons (2p^6), 3s with 2 electrons (3s^2), 3p with 6 electrons (3p^6), 4s with 2 electrons (4s^2), 3d with 10 electrons (3d^10), and finally 4p with 3 electrons (4p^3).

Answer:

1s^22s^22p^63s^23p^64s^23d^104p^3