Question

read the article in the following link and try the simulation to answer the questions. https://www.ck12.org/chemistry/atomic - emission - spectra/ http://www.youtube.com/watch?v=l4yg4htm3uk 1. explain the difference between ground state vs. excited state. 2. when electrons move to a higher energy level they must gain __________. 3. when electrons fall down an energy level they must lose ________ and give off __________. 4. explain why the color produced from the bulb is different then what you see through the spectroscope. 5. why do scientists find out what the universe is made of?

Explanation:

1. The ground - state is the lowest energy state of an atom, with electrons in their lowest possible energy levels. The excited state is when electrons have absorbed energy and moved to higher energy levels.
2. When electrons move to a higher energy level, they must gain energy.
3. When electrons fall down an energy level, they must lose energy and give off light (photons).
4. The color from the bulb is a continuous spectrum of white light. Through a spectroscope, we see discrete spectral lines because atoms emit light at specific wavelengths corresponding to the energy differences between their energy levels.
5. Scientists find out what the universe is made of to understand its formation, evolution, and fundamental properties.

Answer:

1. The ground - state is the lowest energy state of an atom with electrons in the lowest energy levels. The excited state is when electrons are in higher energy levels after absorbing energy.
2. Energy
3. Energy; light (photons)
4. The bulb emits a continuous spectrum of white light. The spectroscope shows discrete spectral lines due to the specific energy - level transitions of atoms.
5. To understand the formation, evolution, and fundamental properties of the universe.