The only way to be sure a chemical reaction or change has occurred is to test the composition of a sample before and after a change.
A kind of chemical bond in the possible reaction products that did not exist in the reactants, or a kind of chemical bond in the reactants that does not exist in the possible reaction products.
Evidence that a chemical reaction has taken place usually include appearance of a precipitate, change in color, or production of a gas.
You must video tape it and make sure the final result is either a physical change or a chemical change.
ask a friend, family member, teacher, chemist, scientist, but i'm 37 percent sure no
sure why not
Signs of chemical reactions may be: - Gas was formed - Formation of a precipitate and water - Reactants disappeared - products were made - energy is released - properties of reactant and products are different
i am not completely sure but i think it (chemical reaction) describes when two or more atoms bond together
well I'm not really sure but i think it needs time to mix in with each other and then it will cause a chemical reaction.
To construct an equation for a chemical reaction, put the reactants on the left, and the products on the right, and make sure that the number of atoms of each element is the same on each side.
I think it is called a compound, but not sure
Some chemical reactions produce heat, these are called exothermic