Question

excited hydrogen atoms emit radiation in which region(s) of the electromagnetic spectrum? answer: a ir only b visible only c uv only d visible and uv e ir, visible, and uv

Explanation:

When hydrogen atoms are excited, electrons jump to higher energy levels. When they return to lower energy levels, they emit radiation. The Lyman series of hydrogen atom emissions corresponds to transitions to the \(n = 1\) level, which are in the UV region. The Balmer series corresponds to transitions to the \(n=2\) level, which are in the visible region. The Paschen, Brackett, and Pfund series correspond to transitions to \(n = 3,4,5\) levels respectively, which are in the IR region. So excited hydrogen atoms emit radiation in IR, visible, and UV regions.

Answer:

E. IR, visible, and UV