Chemical Changes

Chemical Changes

Chemical changes occur when a substance and another substance are formed to make a new substance. In a chemical reaction, the atoms and molecules that interact with each other are called reactants. No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products. For an example, the reactant side will have the same amount of atoms as the products side.

https://www.britannica.com/science/chemical-reaction

https://study.com/learn/lesson/reactants-products-what-are-the-products-in-chemical-reaction.html

If the reactant side and the product side isn't the same though, more atoms will be added from one or the other side to make the equation balanced. To do so, coefficients need to be added to the chemical equation. ... This balances the atoms, making the number of atoms the same on both the reactants and products side. In this example, what you would do to make the equation balanced is you would add to carbon atoms on the left side and 3 Iron atoms which would make the equation balanced.

https://flexbooks.ck12.org/cbook/ck-12-middle-school-physical-science-flexbook-2.0/section/5.17/primary/lesson/balancing-chemical-equations-ms-ps/

Some examples of chemical reactions is combustion, rusting, decomposition or fermentation, cooking an egg, photosynthesis, reacting acids and bases together, chemical batteries, digestion, fireworks, paper burning, and more ideas. Chemical changes happen a lot as even atoms are a part of us. Underneath these words are picture examples of chemical changes examples. 

https://chemistrytalk.org/what-is-a-chemical-reaction/

https://www.thoughtco.com/physical-and-chemical-changes-examples-608338

Lastly is a video about examples of crash course explaining how chemical changes work and showing some examples of it. What you need to do is click on the play button below to watch the video.

https://www.youtube.com/watch?v=37pir0ej_SE

Now I will ask you some questions to the websites and work that ha been placed down on this document.

1. What is a chemical change?

2. No new atoms are ____ and no atoms are ____.

3. Chemicals are an ____  part of technology.

4. Do chemical changes happen often?

5. Are physical changes and chemical changes the same?

6. What are some differences between chemical changes and physical changes?

7. Do chemical changes have to be balanced?

8. What is a reactant and a product?

9. Name a few elements that can be in a chemical change.

10. What are some examples of chemical changes?

11. How can we tell when a chemical change has occurred?

12. What are some chemical reaction examples?

13. A chemical change produces a ________.

14. The starting materials and product is always chemically ____ from one another.

15. What did you learn about chemical changes?