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A reaction between two substances or the decomposition of a substance are chemical changes.

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12y ago

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When atoms combine is it a physical change or a chemical change?

When atoms combine to form molecules, it is a chemical change. In a chemical change, new substances are formed with different properties from the original substances. This is in contrast to physical changes, where the state or appearance of a substance may change without forming new substances.


What type of reaction has occured when two or more substances combine to form another substance?

This is called synthesis, a combination chemical reaction that changes the chemical bonds in the substances.


State the scientific name for substances that can combine in a chemical reaction?

Reactants are substances that can combine in a chemical reaction.


The starting substances that are evolved in a chemical reaction?

The starting substances in a chemical reaction are called reactants. These are the substances that undergo chemical changes to form new substances. Reactants combine and interact during a chemical reaction to produce products.


A change in which 1 or more substances combine or decompose to form a new substance is?

A chemical reaction. This process involves the breaking and forming of chemical bonds between atoms to create new substances with different properties.


When two diffrent substances combine by making chemical bonds what is the result?

When two different substances combine by making chemical bonds, the result is another chemical compound.


What type of reaction has occurred when two or more substance combine to form another substance?

This is called synthesis, a combination chemical reaction that changes the chemical bonds in the substances.


What chemical property allows substances to combine and form new substances?

This chemical property is called reactivity.


What causes substances to combine in different ways to make other substances?

A chemical reaction causes substances to combine in different ways to make other substances.


What substances combine without a chemical reaction?

Substances like oil and water can mix without undergoing a chemical reaction, forming a mixture. Similarly, sugar and water can dissolve into each other without a chemical reaction occurring. These are physical changes where the substances retain their original properties.


Is it a physical change or a chemical change when substances combine to make new substances with new properties?

Chemical change.


Are substances that combine or change?

Substances that combine or change to form new substances go through a chemical reaction. In a chemical reaction, bonds between atoms are broken and new bonds are formed. This results in the creation of new substances with different properties than the original substances.