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I assume you mean how to write out a chemical reaction. Here is an example: Na+ + Cl- = NaCl For more examples you should refer to any High School level Chemistry textbook. If you mean how does a chem reaction look while you are observing it, lots of things can happen. Color change, light, phase transistions, etc...
What else can I help you with?
Is filtering a chemical change?
No, filtering something is not a chemical change.
Is flammability of a substance is physical or chemical change?
Stating that something is flammable is stating a chemical property. But the actual burning would be a chemical change.
How do we know a chemical change has happened?
You can tell if something is a chemical changes or a physical change. Examples: Question 1) Ice melting. Answer 1) Physical change because nothing has changed just the shape of the ice. Reversing ice is easy. Question 2) Wick on a candle changes colour from white to black. Answer 2) Chemical change because it changes from clack to white and will be hard to reverse. So if it is a chemical change taking place it hard to convert back or reverse. You can also tell by the change of colour.
What is the change in matter that produces one or more new substances?
Change in the nucleus of an elemental atom will change or break the atom. Change in the number of electrons in an atom will change its charge. Change in the number of the electrons in a molecule will change its charge and possibly will change its shape, or may break it. New chemicals can be made through combinations of other chemicals. Shooting photons at an atom or a molecule can change something about the atom or molecule, if the photon has the right energy and 'hits' it properly. It is also possible, under appropriate conditions, that a photon of high enough energy shot by an atom will convert into an electron (matter) and a positron (antimatter).
Is baking soda mixed iodine solution a chemical change?
Chemical, When something changes in color, it is a sign of a chemical change.
Is something that burns easily a physical or chemical change?
If you burn something it is a chemical change, however if you melt of boil it, it is a physical change.
Is lighting something a physical or chemical change?
lighting is a chemical change
When something new is made it is a chemical or physical change?
Chemical change
How can you tell chemical change?
The consequence of a chemical change is the modification of the molecular nature.
How can you tell there is a chemical reaction when iron rusts?
Because it is not a physical change it is a chemical change.
Is flammable a chemical or a physical change?
Something that burns or is flammable would be a chemical change.
What is the different of physical change to chemical change?
A physical change is one where just the appearance of something changes and a chemical change is where the genetic makeup of something changes.
How can you tell if somthing has gone through a chemical change?
When chemical changes occur, the atoms are rearranged and the reaction is accompanied by an energy change as new products are generated. Eg of a chemical change is the reaction between sodium hydroxide and hydrogen chloride to produce sodium chloride, or common salt.
Is reactivity with vinegar a physical or chemical change?
If something's reacting, it's a chemical change.
Is strontium reacts with water a chemical or physical change?
When something reacts, that is a chemical reaction. Chemical change.
What is something with no chemical change?
Usually it means that something has gone through a physical change and any chemical properties of that substance are not altered.
When ice melts why can you tell there is not a chemical change?
Melting is not a chemical change because the chemical formula of water remain unchanged.
