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What is an ability of a material to change its chemical makeup?
Chemical property
A change in which one or more substances combine or break apart to form new substances?
chemical change
What are the 5 characteristics of chemical change?
During a chemical change the structure of molecules (as chemical composition) is changed. Signs of chemical reactions may be: - Gas release - Formation of a precipitate - Change of color - Change of odor - Change of pH - Change of aspect - Change of viscosity - Change of the temperature - Visible formation of new compounds
Which change forms a new substance?
The change were new material is produce is called chemical change.
Is giving off light a physical or chemical change?
I would think it to be a Physical Change. Not chemical.
What are three things that are often indications of chemical changes?
Chemical changes can be identified by 1. Color change 2. Fizzing 3. Temperature changes 4. Odor changes 5. Change in the state of matter (solid, liquid, gas)
Is it true or false that indications of a chemical change include light heat and gas production?
True. Light, heat, and gas production are indications of a chemical change. These signs suggest that a chemical reaction is taking place, which involves the formation of new substances with different properties than the original substances.
What clues can you use to identify a chemical change?
Characteristics of a chemical change can include a temperature change, a color change, the production of bubbles, the production of a precipitate, and a smell.
List 5 indications of a chemical change?
If an object has changed its chemical composition it has been through a chemical change. If you can't reverse what has been done in any way (things like burning, mixing, rusting) it's a chemical change
How can a chemical reaction be observed?
Some indications may be: - release of a gas - formation of a precipitate - change of color - change of odor - change of pH - change of viscosity - change of the aspect - etc.
What are the five indications of chemical reactions?
color change release gas release heat form a whole new substance precipitation
What are some clear indications that a chemical reaction took place when two or more chemicals are combined?
Formation of a solid, formation of a gas, usually, but not always, change in temperature. Change in properties of the reactants.
What 5 clues when considering a physical change?
5 clues of a chemical change
Which are 4 indications of chemical reaction has occurred?
The indicators of a chemical reaction are :- 1. Change in colour 2. Change in temperature 3. Evolution of a gas 4. Formation of a precipitate
What are the four occurrences indicate a chemical reaction has occurred?
A chemical reaction can result in any or all of the following: - a change in temperature (up or down) - a change in color - a smell that wasn't there before - the formation of bubbles (indicating the production of a gas) - the formation of a precipitate
What are two possible indications that a chemical change has taken place?
Color ChangesAs in the case of autumn leaves, a change in color is a clue to indicate a chemical change.Perhaps you have found a half eaten apple that turns brown. The reason is that a chemical change has occurs when food spoils.Odor ChangesIt only takes one experience with a rotten egg to learn that they smell different that fresh eggs. When eggs and food spoil, they undergo a chemical change. The change in odor is a clue to the chemical change.Production of Gases or SolidsThe formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change.Another clue that a chemical change has occurred is the formation of a solid. A solid that separates out of solution during a chemical change is called a precipitate.Energy - Absorbed or ReleasedAnother sign of a chemical change is the release or gain of energy by an object.Many substances absorb energy to undergo a chemical change. Energy is absorbed during chemical changes involved in cooking, like baking a cake.
What information is given by the group number of an element?
Indications about the general chemical properties of this element.
