Question

oxygen is perhaps the most important atom on earth. it is responsible for life as we know it, and it is the most abundant atom on our planet. there are more oxygen atoms on earth than all the other elements atoms combined. it was discovered as an atom by antoine lavoisier in 1777. the image shows the bohr atomic model for oxygen. periodic table high school reference sheet which of the following electronic transitions in the oxygen emission? a. ni = 1→nf = 2 b. ni = 1→nf = 3 c. ni = 3→nf = 2 d. ni = 2→nf = 3

Explanation:

Step1: Recall emission condition

Emission occurs when an electron moves from a higher - energy level ($n_i$) to a lower - energy level ($n_f$), where $n_i>n_f$.

Step2: Analyze each option

• Option A: $n_i = 1

ightarrow n_f=2$ is absorption (moving to a higher level).

• Option B: $n_i = 1

ightarrow n_f = 3$ is absorption.

• Option C: $n_i=3

ightarrow n_f = 2$, here $n_i>n_f$, so it is an emission.

• Option D: $n_i = 2

ightarrow n_f=3$ is absorption.

Answer:

C. $n_i = 3
ightarrow n_f=2$