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NAME ___________ KEY _____________ CHEMISTRY 20 ASSIGNMENT 2-1 TOPIC(S) COVERED: Text (14-30) TOTAL MARKS: 32 DIRECTIONS: Read pages 14 to 30 in the text and answer the following questions on this paper. You must use only the information in the text to answer all questions. Complete sentences are not required. 1. Ninety-two naturally occurring elements combine to form the millions of different compounds in nature. (1 mark) 2. Ores are metal compounds that are mined to produce metals, such as iron and copper. (1 mark) 3. For a compound to be solid, some type of attractive force must be holding the individual atoms together. (1 mark) 4. In nature, the noble gases are found as monatomic gases because they are uncombined. (1 mark) 5. The following patterns have emerged from these observations. (4 marks) • Metals are usually found in combination with non-metals, and these compounds are solid . Metals (other than mercury) in pure form are solids. Non-metals can combine with one another to form gases, liquids, or solids. • The only elements that are never found in nature in a combined form are the noble gases. 6. In nature, atoms of elements that have less than
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This note was uploaded on 04/09/2010 for the course CHEMISTRY 1AA3 taught by Professor Goneer during the Spring '08 term at McMaster University.

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