Chapter 8, Part The were the first people to suggest a hypothesis about the nature of matter.
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1 Science 10 Unit 3 Worksheet Chapter 8, Part The were the first people to suggest a hypothesis about the nature of matter. 2. It suggested that all matter was made of the 4 elements called:. 3. An English scientist called created a new definition of an. 4. What was Boyle s conclusion?. 5. The scientific revolution happened in the. 6. The scientists,, and discovered new. 7. Read Activity 8C and briefly consider the answers to questions #1, 2, 3, 4, and 5. Part discovered how to tell from in a laboratory. 9. theorized how to tell elements from non-elements leading to his. 10. Describe the four parts of Dalton s Atomic Theory: 11. Read the profile about John Dalton found on page Review the terms Atomic number, Mass number, Atomic mass, Isotopes, and Neutral atom. 13. Briefly explain Bohr s model of electron arrangement: 14. Sketch figure 8.4 on page 171 and read about orbits. Do the instant practice on page 172. ProActive Curriculum Ltd. - Rev: 10/14/03 Page 1 of 5
2 15. Elements produce a of coloured lines made visible through a. 16. Describe Bohr s explanation of why each element has its own spectrum: 17. Read the Review 8.2, answer questions #1-3 found on page 174. Part Who developed the first periodic table?. 19. How did he sort the various elements?. 20. In what way is the modern periodic table different to the first one? Why? Part The of the periodic table are known as. 22. The only elements which do not form compounds with hydrogen and fluorine are,, and. These are unlikely to because their are full. 23. The most active metals on the periodic table are called the. 24. As a result, they are never found as in nature since they easily combine with other elements. are very common everywhere on earth. 25. The elements in the need one in their outer orbits. Both and make up the most reactive of the. 26. Why is Hydrogen considered to be a family of one? 27. rows of elements on the periodic table are called. As you go from within a period, the elements change from to, then lastly to. Chapter 9, Part Substances made of several combine in a definite formula are called. 29. All compounds have their own chemical. ProActive Curriculum Ltd. - Rev: 10/14/03 Page 2 of 5
3 30. What is meant by the terms Acid or Base? 31. What is the result of a reaction between an acid and a base?. 32.,, and are used to classify in chemistry. 33. Dyes such as which help classify acids and bases are called. 34. List and give examples of some practical uses of acids and bases: 35. What is meant by the process of Neutralization?. 36. Give some examples of neutralization:. 37. Copy the table 9.5 found on page 192 and list some practical uses of salts: Part Read about the formation of sodium chloride on pages 193 to 195. During this process, the sodium atom an electron and this results in a charge. This because the sodium atom has 11 positive and only 10 negative. Chlorine has now an extra and is no longer a. 39. The movement of from one atom to another is called. The resulting charged particles are called. Because the sodium and chlorine ions have opposite charges, they each other and make an. 40. The force attraction of positive and negatively charged ions is called and. ProActive Curriculum Ltd. - Rev: 10/14/03 Page 3 of 5
4 41. Ionic are formed by between and. 42. refers to the number of electrons an atom must gain or lose to be stable. 43. Read figure 9.12 on page 196. Read about the combining capacity of magnesium in figure Part Read Example II on page 199 and study figure 9.15 on ionic bonding of potassium and fluorine. 45. Describe the rules for writing chemical formulas: 46. Try Example III on page 200/201. Try the instant practice exercises #1 to 3 on page If there are only 2 elements in an bond, the name ends with. 48. List some elements which have more than one combining capacity?. 49. If ionic compounds are dissolved in water, groups of ions which stay together are. 50. List the Polyatomic Ions found in figure 9.8. Read Example V on page 203. These ions, when they are part of a formula, change the endings of their names. Part When two atoms come close together, each electron is to the other s nucleus. The concept of holding atoms together is called a. 52. Molecules with two atoms with covalent bonds are called. 53. Copy the chart of Diatomic Covalent Molecules found in figure 9.9 on page 206. ProActive Curriculum Ltd. - Rev: 10/14/03 Page 4 of 5
5 54. When there is electron between non-metal elements, a is formed. 55. Draw the four covalent compound examples shown in figure 9.22 on page The combining capacity of an atom tells how many it must,, or to achieve a outer. 57. Use the Criss-Cross method shown in writing formulas for covalent compounds on page 208 and do the instant practice on page 209 of your text book: 58. List several common covalent compounds whose names tell nothing about their formulas: 59. help us identify when two elements form two or more. 60. List several common covalent prefixes:. ProActive Curriculum Ltd. - Rev: 10/14/03 Page 5 of 5
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