Catalyst: a substance which speeds up a chemical change or enables the change to take place at a lower tempature, and is not changed or used up in the reaction.
a catalyst
A change from one or more substances to another is a chemical change.
The change were new material is produce is called chemical change.
LIQUDIFCATION!!!!!!!! Change of phase; the process is called melting.
A change of state where energy is removed from a substance is called an exothermic reaction. This chemical reaction releases energy in the form of light or heat.
If you mean changing one element into another, like uranium 238 into plutonium 239, which happens in nuclear reactors, the word is 'transmutation'. Otherwise many chemical reactions form new substances, without the elements involved changing, and these would be called 'chemical reactions'.
The answer is catalyst
A substance that undergoes change in a chemical reaction is called a reactant.
It is called a reactant. While catalysts participate in reaction dynamics, they are not permanently changed in the process.
chemical reaction is when a substance is changed chemicaly but not physicaly
if at the end of the chemical THAT substance is unchanged .That substance is a catalyst. If it slows donw the reaction, it is called an inhibitor.
This chemical process is called synthesis.
This chemical process is called hydration.
A change from one or more substances to another is a chemical change.
Chemical reaction
The processes are called chemical reactions.
Chemical Property
These are called catalysts.