Question

1. how is placing a helium or nitrogen lamp in front of a prism different from a normal light bulb?
2. in your own words, what does the atomic emission spectrum of an element show us?
3. how can the atomic emission spectrum be used in the real world?
4. what happens when an element is excited from a ground state and then the electron returns to the ground state?
5. what is the ground state of an electron?

a) when the electron is at its highest possible energy.
b) when the electron has the lowest possible energy.
c) when the electron is no longer orbiting the nucleus.
d) when the electron is in an excited state.

1. what is the name of the series of ultra violet light that is emitted when hydrogen is excited and returns to n=1? why is this series of light so dangerous?
2. what series of light is emitted if hydrogen’s lone electron only falls to n=3? why is this series of light so important to humans, provide a real world reason?

Explanation:

1. A helium or nitrogen lamp emits light composed of discrete spectral lines due to the atomic emission of those elements. A normal light bulb emits a continuous spectrum. When placed in front of a prism, the helium or nitrogen lamp will produce a line - spectrum while the normal bulb will produce a rainbow - like continuous spectrum.
2. The atomic emission spectrum of an element shows the specific wavelengths of light that the element emits when its atoms are excited. Each element has a unique emission spectrum, like a fingerprint, which is related to the energy transitions of its electrons between different energy levels.
3. In the real world, atomic emission spectra are used in spectroscopy for element identification in various samples such as in astronomy to determine the composition of stars, in forensic science to analyze evidence, and in industry for quality - control of materials.
4. When an element is excited from its ground state, electrons move to higher energy levels. When the electron returns to the ground state, it releases energy in the form of a photon. The energy of the photon corresponds to the energy difference between the excited state and the ground state.
5. The ground state of an electron is when it has the lowest possible energy. So the answer is b).
6. The series of ultraviolet light emitted when hydrogen is excited and returns to n = 1 is called the Lyman series. It is dangerous because ultraviolet light has high energy and can damage biological tissues such as skin and eyes, and can also cause chemical reactions that lead to the degradation of materials.
7. When hydrogen's lone electron falls to n = 3, the Paschen series of light is emitted. It is important to humans as it is used in astronomical studies to analyze the hydrogen - rich regions in space, such as in nebulae. By studying the Paschen series, astronomers can learn about the temperature, density, and other properties of these regions.

Answer:

1. A helium or nitrogen lamp produces a line - spectrum while a normal bulb produces a continuous spectrum when passed through a prism.
2. It shows the specific wavelengths of light emitted by the element due to electron energy transitions.
3. Used in spectroscopy for element identification in astronomy, forensic science, and industry.
4. A photon is released with energy equal to the energy difference between the excited state and the ground state.
5. b) When the electron has the lowest possible energy.
6. Lyman series; because it has high - energy UV light that can damage tissues and materials.
7. Paschen series; used in astronomical studies of hydrogen - rich regions in space.