Provide any explanation at the subatomic level for how flame color is produced. Your answer should include a discussion of the e
1 answer:
Answer:
The flame provides an input of energy. It excites electrons in the material that is being burned. These electrons get promoted to a higher atomic energy level. When they return to a lower energy level, they release energy in the form of light (an output of energy.) The frequency of the light depends on the energy difference between the initial and final energy level of the electron. The color of the flame depends on the frequency of the emission.
Explanation:
There are multiple electron energy levels within an atom. During most of the time, electrons in an atom stay in levels with the lowest potential energy possible. However, when the atom gets heated (e.g., over a flame,) electrons will gain energy from the flame and move to levels of higher potential energy.
As more electrons get promoted, some will eventually fall back to their initial energy level. Electron energy levels in an atom are quantized. In other words, the energy difference between two levels is a definite value, and that no electron can exist between two energy levels.
Energy conserves. These potential energy needs to go somewhere. In the case of an electron transition, the potential energy that has been lost will be released as an electromagnetic emission. Keep in mind that only one photon will be released for each transition. That photon will account for all the potential energy differences . The Planck-Einstein Relation gives the frequency
of that photon. That's the same as the frequency of the beam of light that is observed.
,
where is Planck's Constant.
The frequencies of most of these transitions are in the infrared region of the spectrum. If there are more than one few visible emissions, these emissions combine to produce a distinct flame color.
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Answer:
Any binary molecular compound of hydrogen and a Group 6A element above Selenium will be less acidic, so water and dihydrogen sulfide are less acidic in aqueous solution than hydrogen selenide.
Explanation:
Going down in a group increases the atomic radius and a greater atomic radius implyes greater ionic radius.
When ionization takes place in these compounds they yelds protons (hidrogen ion) and an lewis base (anion). The greater the ionic radius the greater its stability, thus the periodic tendency is increaing the acidity of binary hidrogen compounds when going down a group. On the other hand going up a group decreases acidity, so any molecular compound of hydrogen and a Group 6A element above Selenium will be less acidic, so water and dihydrogen sulfide are less acidic in aqueous solution than hydrogen selenide.
