Study Guides - Cherokee County Schools

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Name Date Class 2 62 Masses of Atoms <strong>Study</strong> Guide Masses of Atoms Directions: Answer the following questions on the lines provided. 1. What are isotopes? 2. How do Boron-10 and Boron-11 differ? 3. What is the average atomic mass of an element? 4. Compare and contrast the atomic structure of the chlorine-35 and chlorine-37 isotopes. Chapter 17 5. Suppose that a newly discovered element called centium has three isotopes that occur in nature. These are centium-200, centium-203, and centium-209. Assume that these isotopes occur in equal amounts in nature. What will be the average atomic mass of this element? Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc. Name Date Class 3 <strong>Study</strong> Guide The Periodic Table Chapter 17 Directions: You will need a scientist’s patience to find the names of the 70 elements hidden in the grid. The lanthanides and the actinides have been excluded. The same letters may appear in more than one element name. Draw a line through the letters that correctly spell the name of an element. Directions: Complete the following paragraphs about the periodic table by filling each blank with the correct term. In the modern periodic table, elements are listed by increasing 1. ________________. Each box represents an 2. ________________. A box contains the name, atomic number, 3. ________________, and 4. ________________ for the element. Vertical columns in the table are called 5. ________________. Most elements in a column have the same number of 6. ________________ in the outer energy level and tend to have similar 7._________________. Horizontal rows in the table are called 8. ________________. The elements on the left side of the table are 9. ________________. Groups 3–12 contain metals known as 10. ________________. Elements on the right side are 11. ________________. The Periodic Table 63
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Study Guides - Cherokee County Schools

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