Question

question 8 (11 points)
which conclusion did scientists draw from excited hydrogen atoms always producing the same line emission spectrum despite the amount of energy added? choose the correct answer.
o a hydrogen can exist only in the ground state.
o b hydrogen releases photons of only certain energies.
o c hydrogen has no electrons.
o d hydrogen does not release photons.

Explanation:

When hydrogen atoms are excited, electrons move to higher energy levels. When they return to lower levels, they emit photons. The fact that the same line - emission spectrum is produced regardless of the energy added (as long as it's enough to excite the atoms) implies that there are specific energy differences between electron energy levels in hydrogen. Each line in the emission spectrum corresponds to a photon with a specific energy (since \(E = h
u\), where \(E\) is energy, \(h\) is Planck's constant, and \(
u\) is frequency). So, hydrogen releases photons of only certain energies.

• Option a is incorrect because hydrogen can be excited (electrons can move to higher energy levels).
• Option c is incorrect as hydrogen has one electron.
• Option d is incorrect because hydrogen does release photons when electrons de - excite.

Answer:

B. Hydrogen releases photons of only certain energies.