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Questions and Answers
When atoms bond with other atoms, a ______ bond is formed.
When atoms bond with other atoms, a ______ bond is formed.
chemical
The formation or breaking of these bonds changes the ______ properties of the substance.
The formation or breaking of these bonds changes the ______ properties of the substance.
chemical
An example of a ______ change is that coal consists of bonded carbon atoms.
An example of a ______ change is that coal consists of bonded carbon atoms.
chemical
When coal burns, the oxygen molecules in the air bond with the carbon atoms, forming new molecules of carbon dioxide, which differs in its properties from Both carbon and ______.
When coal burns, the oxygen molecules in the air bond with the carbon atoms, forming new molecules of carbon dioxide, which differs in its properties from Both carbon and ______.
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So a chemical change is a change that results in new substances that have chemical properties that differ from the properties of the original ______.
So a chemical change is a change that results in new substances that have chemical properties that differ from the properties of the original ______.
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Some signs that may indicate the occurrence of a chemical change can be observed, including a change in ______.
Some signs that may indicate the occurrence of a chemical change can be observed, including a change in ______.
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When charcoal burns, new chemical bonds form between carbon and oxygen atoms, producing a gas molecule called ____________.
When charcoal burns, new chemical bonds form between carbon and oxygen atoms, producing a gas molecule called ____________.
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Chemical changes enable our bodies to carry out their functions, provide means of transportation with the energy needed to move them, and change the color of ____________ leaves.
Chemical changes enable our bodies to carry out their functions, provide means of transportation with the energy needed to move them, and change the color of ____________ leaves.
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Baking dough, frying eggs, and digesting food are all examples of ____________ changes.
Baking dough, frying eggs, and digesting food are all examples of ____________ changes.
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A chemical reaction consists of two parts: substances present before the chemical change occurs, which are the ____________, and substances that result from the chemical change.
A chemical reaction consists of two parts: substances present before the chemical change occurs, which are the ____________, and substances that result from the chemical change.
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The arrow in the chemical equation separates the reacting substances towards the tail of the arrow and the resulting substances towards the head, indicating the formation of new ____________.
The arrow in the chemical equation separates the reacting substances towards the tail of the arrow and the resulting substances towards the head, indicating the formation of new ____________.
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The law of conservation of mass states that matter is neither destroyed nor created during a chemical reaction, but rather transforms from one form to another, ensuring that all atoms that existed before the reaction are the same ones that exist after the reaction ends. This concept is known as the ____________.
The law of conservation of mass states that matter is neither destroyed nor created during a chemical reaction, but rather transforms from one form to another, ensuring that all atoms that existed before the reaction are the same ones that exist after the reaction ends. This concept is known as the ____________.
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