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Why alkali metals and their salts give characteristic colors to the flame?
Wiki User
∙ 12y ago
what happens is the heat energy being transmitted from the flame to the metal causes the electrons to "jump" to a higher electron orbital. As with most of things what goes up must go down and the same is applicable for the electron it falls down the orbital shell releasing energy in the form of light displacing colour. we use this technique for day-day activities for example street lamps are yellow due to the Na (sodium) vapour and the many array of metal salts in fire works barium being my favourite GREEN
hope that explains it
Fahed
Wiki User
∙ 15y ago
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Why not all metals emit colors in the flame test?
no not all metals produce a colour flame.
What is the origin of flame colors?
Flame colours come from alkai metals reacting with salts to produce different colours.
Can you give an example of a combustion with no flame?
When alkali metals react with water it will explode. Potassium dissolved in water and rubidium and cesium very highly reactive metals dissolved in water will create combustion. Search brainiac alkali metals on youtube.com and see for your self.
Why alkali metals impart color in Bunsen flame?
when alkali metals are exposed to flame test, the loosely bounde electrons which present in valency shell are excited to higher energy levels, after some time they will come back to ground state by emiiting radiation which falls under visible region gives colour.
Why is the flame test for metallic ions?
When an electron jumps from an energy level that is farther away from the nucleus to an energy level that is closer to the nucleus the electron gives off energy. When doing a flame test this energy is in the form of a color change. One can identify the change based off of the color.
Why not all metals emit colors in the flame test?
no not all metals produce a colour flame.
Why transition metal can not be determined by a flame photometry?
Since the temperature isn't high enough to excite transition metals, the method is selective toward detection of alkali and alkali earth metals.
Why is color used to analyze?
You think probable to flame test; some metals have specific colors in a flame.
What is the origin of flame colors?
Flame colours come from alkai metals reacting with salts to produce different colours.
Can you give an example of a combustion with no flame?
When alkali metals react with water it will explode. Potassium dissolved in water and rubidium and cesium very highly reactive metals dissolved in water will create combustion. Search brainiac alkali metals on youtube.com and see for your self.
Why alkali metals impart color in Bunsen flame?
when alkali metals are exposed to flame test, the loosely bounde electrons which present in valency shell are excited to higher energy levels, after some time they will come back to ground state by emiiting radiation which falls under visible region gives colour.
Why do metals always impart their characteristic colors to a flame?
The defining characteristic of metals, in a chemical sense, is that they have between one and three valance electrons and they tend to lose electrons, as compared to non metals which have a larger number of valance electrons and are much less prone to losing them. So, when a metal is heated sufficiently, outer electrons get hot enough to leave the atom. Then, electrons are recaptured. In the process of becoming part of an atom again, an electron emits a photon, with a typical wavelength for a given element, thereby creating a characteristic color. As a result of this process, the color of a flame is mainly due to whatever metals are present.
Are the waves produced by the magnesium ion flame test of a higher or a lower frequency than the visible spectrum?
For the alkali metals, higher atomic number results in a lower wavelength flame test color. If the alkali earth metals follow the same trend then magnesium should have a higher wavelength (LOWER FREQUENCY) than the visible spectrum.
Why is the flame test for metallic ions?
When an electron jumps from an energy level that is farther away from the nucleus to an energy level that is closer to the nucleus the electron gives off energy. When doing a flame test this energy is in the form of a color change. One can identify the change based off of the color.
What is the characteristics of the alkali metal group?
Alkali metals are very reactive, react easily with water, forms strong bases, have low de density, have low hardness, the flame is strongly colored, forms ionic bonds, etc.
Why does barium give a green flame test?
The heat of the flame excites the metals ions, causing them to emit visible light. The characteristic emission spectra can be used to differentiate between some elements.SO the characteristic emission spectra of Barium contains wavelengths corresponding to green color.
What is flame photometry?
flame photometry involves the determination of concentration of alkali and alkaline earth metals present in a sample based on the radiation emitted by it when the sample is atomized to a flame
