Across
- 3. A number placed in front of the parts of a chemical equation to indicate how many are involved; always a positive whole number
- 7. A type of reaction in which the positive and negative portions of two ionic compounds are interchanged
- 11. The study of relationships between measurable quantities such as mass and volume, and the number of atoms in chemical reactions.
- 15. A flowing substance with a definite volume but an indefinite shape
- 16. the kind and number of atoms of each element present in a molecular compound
- 18. Percent by mass of each element in a compound
- 20. The simplest ratio of ions in a compound
- 22. A substance in which the particles occupy fixed positions in a well-defined, three dimensional arrangement.
- 24. A substance that undergoes a reaction
- 27. The smallest particle of a given type of matter
- 29. A biological catalyst
- 30. A measurement of the “amount of a substance”
- 31. A flowing compressible substance with no definite volume or shape
- 32. Term for a system where no net change occurs in the amount of reactants or products
- 33. A substance that speeds up the rate of a reaction without being used up itself or permanently changed
- 34. is equal to the atomic mass units
- 35. The name applied to a reaction in which two more more substance combine to form a single product
Down
- 1. A substance that slows down a reaction
- 2. A reaction in which a substance reacts with oxygen gas releasing energy as heat and light
- 4. An uncharged group of two or more atoms held together by covalent bonds
- 5. A new substance formed when reactants undergo a chemical change
- 6. The reactant of which there is not enough; when it is used up, the reaction stops and no new product is formed
- 8. The formula of a compound having the smallest whole-number ratio of atoms in the compound
- 9. 6.022 x 1023
- 10. States that if a stress is applied to a system at equilibrium, the system shifts in the direction that relieves the stress.
- 12. A substance that cannot be broken down into simpler substances
- 13. A solution dissolved in water, abbreviated (aq) in a chemical equation
- 14. The mass in atomic mass units of one molecule of a covalent compound
- 17. The amount of energy the particles in a reaction must have when they collide for the reaction to occur.
- 19. The maximum amount of product that can be produced from a given reactant - determined by stoichiometric calculations - expressed as a percent.
- 21. A type of reaction in which one element takes the place of another in a compound
- 23. The name applied to a reaction where a compound breaks down into two or more simpler substances
- 25. The amount of a substance present in a unit volume
- 26. A number written in a smaller font, positioned to the right of a chemical symbol to indicate the number of atoms of a particular element that are found in a molecule
- 28. The ratio of actual yield (from an experiment) expressed as a percent