Rates and Types of Chemical Reactions

1. When a more reactive element pushes out a less reactive one from a compound.
3. Reaction where one compound breaks down into simpler substances.
6. How quickly reactants turn into products.
8. Sometimes released in a reaction, observed as bubbling or fizzing.
9. Reaction between acid and base to form salt and water.
10. Reaction where two compounds swap parts to form two new compounds.
12. When particles must bump into each other to react.
18. A chemical reaction written using words, e.g. hydrogen + oxygen → water.
20. Increasing this by crushing a solid speeds up a reaction.
21. Smallest particle of an element.
23. Substances formed after a chemical reaction.
24. Reaction where two or more substances combine to form a new compound.
26. The type of energy particles gain when heated.
27. Mass is neither created nor destroyed in a chemical reaction.
28. Shows the ratio of atoms in a molecule or compound.
29. A substance that speeds up a reaction without being used up.
31. energy Minimum energy needed for a reaction to start.
33. Has the same number of atoms of each element on both sides.

2. Two or more atoms bonded together.
4. Tiny entities that collide to make chemical reactions happen.
5. When one element replaces another in a compound.
7. Pure substance made of one type of atom.
11. Reaction that forms an insoluble solid in solution.
13. Reaction of a substance with oxygen, often releasing heat and light.
14. Raising this gives particles more energy and increases reaction speed.
15. A reaction written using chemical symbols and formulas.
16. More particles per volume leads to faster reactions.
17. Small number in a chemical formula showing how many atoms are present.
19. Number placed before a formula to balance an equation.
22. Increasing this in gases pushes particles closer, making reactions faster.
25. Two or more different atoms bonded together.
30. Combination of substances not chemically bonded.
32. Starting substances in a chemical reaction.