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What is metal changes color over time from exposure to air what has likely occurred?
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∙ 6y ago
Chemical Reactions!!??
Wiki User
∙ 6y ago
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If a substance changes its color and gives off a gas when heated is it a compound?
Not necessarily. Any combustible chemical, such as engineering polymers, will likely do that.
Is it true that Physical changes are often accompanied by changes in color or odor.?
No. It is false. Physical changes are not accompanied by changes in color or odor.
My eyes constantly change between gray and green and blue theyre blue most of the time but every now and then they stay green or gray for an entire week Why does this happen?
While changes in eye color of infants are more common, even in adults, eye color changes are seen, most often as a result of exposure to the sun. Sunlight triggers melanin production in the eye, as it does to the skin.
What are some of the signs that a chemical change has occurred?
A sign of a chemical change is the release or absorption of energy in the form of light, heat, or sound. Also, the formation of gas or a solid that isn't the result of a change in state.
What is halochromic?
A halochromic material is a material which changes color when pH changes occur.
Does color changes indicate a chemical change?
Yes. If you mix substances and the mixture changes to a color that is not one of the colors of the things you mixed, then a chemical reaction has occurred. For example, mixing white starch with brownish iodine will immediately turn the starch a very dark blue color.
What happens to M8 paper when it comes to contact with a liquid nerve or blister agent?
it changes color
What happens before sun exposure?
before sun exposure you are your normal skin tone/color.
Which portion of the skin changes when you get a suntan?
When your skin gets exposure to the sun rays, skin darkens. Sun tan is caused due to increased melanin. The color of skin darkens when you get a suntan.
How does a chemical change affect the composition of matter?
chemical change = chemical reaction. ( the composition of matter always changes). In a chemical change the matter in one thing changes, for example you will know a chemical change has occurred when the color or odor has changes or when a new gas is given off.
If a substance changes its color and gives off a gas when heated is it a compound?
Not necessarily. Any combustible chemical, such as engineering polymers, will likely do that.
If a substance changes color what has most likely happened chemical or physical change?
Very probable a chemical change; but also physical changes can be the cause.
Is it true that Physical changes are often accompanied by changes in color or odor.?
No. It is false. Physical changes are not accompanied by changes in color or odor.
Why does a chemical reaction which have occurred between acids and bases change color?
When an acidic pH less than 6 changes to base pH which is more than 7, if an indicator is present we can see the color change from acid to base or viceversa
What changes color?
A chameleon is an animal that changes color based on it's surroundings.
Are color and density chemical changes?
Color and density are physical properties, not changes.
When paper changes from yellow to brown in sunlight what type of change occurred?
A chemical change. Color change is a good indicator of a chemical change.
