Name:__________________ Date: ______________________ Period:______ Chapter 4 Study Guide 32 Most Common Elements Review Textbook Ch. 4, all sections 1. What is a pure substance? 2. What is a compound? 3. What type of change is needed to break down a compound? Why? 4. How do the properties of a compound compare with the properties of the elements it is made from? Give an example. 5. What is the smallest particle of an element? Compound? Hydrogen (H) Helium (He) Lithium (Li) Beryllium (Be) Boron (B) Carbon (C) Nitrogen (N) Oxygen (O) Fluorine (F) Neon (Ne) Sodium (Na) Magnesium (Mg) Aluminum (Al) Silicon (Si) Phosphorus (P) Sulfur (S) Chlorine (Cl) Argon (Ar) Potassium (K) Calcium (Ca) Iodine (I) Titanium (Ti) Chromium (Cr) Iron (Fe) Cobalt (Co) Nickel (Ni) Zinc (Zn) Lead (Pb) Iodine (I) Gold (Au) Silver (Ag) Mercury (Hg) 6. Create a Concept Map (connect the words showing how they are related) on a separate sheet of paper. Use the following words: a. b. c. d. Colloid Compound Element Heterogeneous e. f. g. h. Homogeneous Matter Mixture Pure substance i. j. Solution Suspension 7. Explain the similarities and differences between homogenous mixtures (solutions) and heterogeneous mixtures (suspensions and colloids) using the table below. Solutions Suspensions Colloids Particles settle? Chemically or physically combined? 2 Examples of each 8. What are two ways of separating a mixture? 9. You have a salt/water mixture. You dump pebbles and iron filings into it. Describe how you would separate out each substance. i. The iron filings: ii. The pebbles: iii. The water: iv. The salt: 10. Is a solution always made of a solid dissolving in a liquid? Please explain your response and name the exception. 11. Describe 3 examples of using alloys in your life. Why do you think they were chosen for their purpose. (Think properties….) 12. A chocoholic loves chocolate. Would a chocoholic make a chocolate drink that is dilute or concentrated? Explain. 13. Elements are grouped into three categories. What are the three categories and explain each. 14. What is a mixture? 15. There are two types of mixtures, heterogeneous and homogeneous, fill in the Venn diagram to show the differences and similarities between both mixtures. 16. What is a solution and what are the components that makeup a solution? 17. What is a saturated solution? How do you know when a solution is saturated? 18. List three ways to make a solute dissolve faster in the solvent. 19. You’ve just finished painting a room and it’s time for cleanup. You read the directions and find that you need to use paint thinner to remove the paint. Name the solvent, solute, and solution in this example. 20. What is a suspension? Give two examples. 21. An ______________ is a pure substance that is made up of just one type of atom. 22. All the elements known to scientists today are listed in the _____________ ____________. 23. When two or more elements are chemically combined they form a __________________. 24. When one substance is dissolved in another, a _______________ is created. 25. A solution is really a ____________________ mixture. 26. The substance in a solution that is being dissolved is called the _______________ and the substance that does the dissolving is the _______________. 27. In a _______________ the solid particles are suspended in the liquid; after time they will settle out to the bottom. 28. A colloid is a ________________ mixture. 29. Substances in a mixture ___________ (do, do not) change their identity. They can be separated out by using ____________ (physical, chemical) changes. 30. Substances in a compound __________ (do, do not) change their identity. They can only be separated out by ___________ (physical, chemical) changes. 31. In ______________ (solutions, suspensions) the substances separate after standing awhile. The substances _____________(can also, cannot) be separated by filtration. 32. A(n) _________________’s particles are between those of a solution and a suspension. 33. For the following place a check in the box if the substances are an element, a compound, a solution, or a heterogeneous mixture. Substances Magnesium wire Tea Chocolate Milk Salt Water Cranberry juice Salt Chocolate Chip Cookies Element Compound Solution Heterogeneous Mixture