Light is usually viewed as a result of the heating of a substance. The higher the temperature at which the substance is heated, the greater the vibrations that lead to certain light intensity given off by the molecule. It is this same theory that suggests why steel glows red hot when heated to high enough temperatures. The process of light emissions can also be induces through other means. 1…
When atoms or ions in ground state are heated to a higher temperature, some electrons absorb enough energy to move them to higher energy levels. This is known as the excited state. However, the excited configuration is unstable, and the electrons must return back to their positions in the lower energy level. As they return, the energy that was previously absorbed is now emitted in the form of electromagnetic energy. This energy can be displayed in the form of visible light. The main purpose/objective of this lab was to observe the characteristic colors produced by certain metallic ions when they are vaporized in a flame. Another main objective of this lab was identifying the unknown metallic ions by means of flame tests. In this lab, this is what was supposed to be…
When atoms absorb energy, electrons move into higher energy levels, and these electrons lose energy by emitting light when they return to lower energy levels. Energy levels are fixed energies that electrons can have. Ordinary light is made up of a mixture of all the wavelengths of light. Light, consisting of waves consists of wavelength and frequencies that are inversely proportional to each other, so as the wavelength of light increases,…
1. An AM radio station broadcasts at a wavelength of 0.500 kilometers. Microwaves can have a wavelength of 12 cm. A fire place can give off photons with a wavelength of 1.5 x 10-3 millimeters and the X-rays used in a dentist’s office have a wavelength of 2.1 x 10-11 meters. Ultraviolet rays, the ones that give you sunburn or fade the colors of clothes have a wavelength of about 3.0 x 10-7 meters. From this data, what can you conclude about the energy of a photon with respect to its wavelength?…
As the substance heats up, the electrons gain energy from the flame to move to a higher level of energy. At this higher energy level, the electrons become unstable and start to come back down to the “ground state” (lower energy levels). As this happens, the electrons in the substance release a certain amount of energy, which we see as a color…
1. Explain, in your own words, why different elements produce different colors of light when heated. Different elements produce different colors of light when heated because they are able to get to a different energy state, and then they lose energy from heat and the flame changes color.…
I. Purpose: To observe the colors produced when compounds are introduced into a flame and the electrons become excited. To estimate the wavelength of light produced, then calculate the frequency and energy of the light…
If an electron absorbs sufficient energy to bridge the “gap” between energy levels, the electron may jump to a higher level and become “excited”. Since this change results in a vacant lower orbital, the configuration is unstable. The excited electron releases its newly acquired energy and falls back to its initial or “ground state”. Sometimes the excited electrons acquire sufficient energy to make several energy level transitions. When these electrons return to their ground state, several distinct energy emissions occur. Electrons may become excited when a sample of matter is heated or subjected to an electrical current. The energy that electrons emit when returning to the ground state is electromagnetic radiation, or EMR. Sometimes the EMR can be seen as visible light.…
When a ground state absorbs the heat energy from the flame they become excited and they want to get back to the ground state. As they return to the ground state they release the heat energy they absorb which is seen as visible light.…
Explain, in your own words, why different elements produce different colors of light when heated. Each element has a unique electron configuration. When heated, the electrons are energized and this leads to a higher quantum state. The color depends on the distance you have and the original electron configuration.…
In this experiment we are trying to observe this amazing phenomenon. Heating up different elements using a flame, we are able to see the change in states and the emitted photons. In the process we will try to answer questions such as: how does the amount of energy absorbed by electrons affect the color of light produced? What does the light produced tell us about the energy of the emitted photon? What has more energy, a photon that takes one big step, or photons that take many steps? Our objective is to observe the unique color of light emitted by each element, and determine the…
b. Place small amounts of the substance to be tested in each of the four micro test tubes.…
1. Determine the mass of the samples to the nearest 0.01 gram. Record. 2. Fill a 100 ml graduated cylinder about three quarters full with water. Measure the volume, and record as “volume of water alone” in the data table. Tilt the cylinder and carefully slide one of the samples down the side. Make sure the sample is completely submerged in the water. Measure the volume and record as “volume of water + sample” in the data table.…
The energy levels of elements and of their atoms are different. When heated all the molecules jump around into wavelengths that we perceive as color.…
For the coloured light to be emitted, the electrons have to get enough energy to jump higher away from the nucleus and then fall back closer to it. When chemicals are heated, the flame provides energy for the electrons.…