As the electrons change orbits, they change energy levels. The energy is released into photons - which is the light of a fire.
When different elements oxidize, they give off different energies - thus different colors.
chemicals normally acids and bases change their chemical nature due to bacteial growth after a certain period of time for example 0.01,0.1,1m Hcl expired after 6months normaly,iron salts expecially ferros salts are converted into ferric upon oxidation(photooxidation) Fe+2 ----> Fe+3 Cu+1-----> Cu+2 most of the chemicals due to hygroscopic or anhydrous nature change by absorbing moisture from air,like NaOH and anhydrous salts e-g CaCl2
It depends on what type of color change is being referred to.
In the case of pigmentation changes - Yes, it is a chemical change.
In other cases, the angle of light could change.
It depends on what kind of chemical reaction. lower energy chemical reactions are less likely to have color changes.
in other words, there is really no way to answer. Just one note: color change means chemical reaction, but chemical reaction doesn't always mean color change
A chemical reaction happens when different molecules interact causing the chemical change. The chemical changes means that the molecules that interacted are no longer present, but they have combined in a new way to form something else.
A permanent change of color can indicate a chemical change.
Only when put this way: the color is changed as a result of a (reversible) chemical (reaction) change of the indicator molecule
Some do, but not all.
A pH indicator.
no
No, it is NOT an indicator of a chemical reaction. Change in color IS an indicator of chemical change, though.
Not necessarily. Things sometimes change colors during a chemical reaction, but a color change is not sufficient evidence of a chemical reaction. You can add drink mix to water and the water turns colors, but it is not a chemical reaction, just a mixture.
The color purple is a physical property, but if it appears during a chemical reaction, it is representative of a chemical change.
Generally, you know a chemical reaction has occured if there is a change in temperature, a change in color, a formation of a gas (bubbles), or any kind of flame.
No, it is not true.
No, it is NOT an indicator of a chemical reaction. Change in color IS an indicator of chemical change, though.
The change of color may be a sign of a chemical reaction.
- Color is a physical property and the change of color also.- Color change may be a sign of a chemical reaction.
Yes it is chemical change.
Not necessarily. Things sometimes change colors during a chemical reaction, but a color change is not sufficient evidence of a chemical reaction. You can add drink mix to water and the water turns colors, but it is not a chemical reaction, just a mixture.
Change of shape can not be used to indicate a chemical reaction has happened. Examples of evidence of a chemical reaction are changes in odor or color.
Evidence of a chemical reaction include the following: formation of a precipitate formation of a gas change in temperature change in color
Yes, the signs of a chemical reaction are: gas, precipitation, heat, color change
Change of color.
The color purple is a physical property, but if it appears during a chemical reaction, it is representative of a chemical change.
Generally, you know a chemical reaction has occured if there is a change in temperature, a change in color, a formation of a gas (bubbles), or any kind of flame.
No, it is not true.