What is the energy of a photon of light whose frequency is 7.85 x 1015 Hz? A.5.20 x 10^-18
B.2.53 x 10^-41 )
C.3.82 x 10^-8)
D.2.36 X 10^24 J

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;

4d^55s^1 ( third choice)