Question

question 13 (1 point) the atomic spectrum of which element played an important role in advancing atomic theory in the early 1900s? hydrogen xenon helium neon

Explanation:

In the early 1900s, the atomic spectrum of hydrogen played a crucial role in advancing atomic theory. Its relatively simple spectrum allowed scientists like Niels Bohr to develop models of the atom. The distinct spectral lines of hydrogen could be explained by quantized energy levels, which was a significant step in understanding atomic structure.

Answer:

A. hydrogen