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Ch 5 – The Period Table – Introduction WS Question Answer 1. Describe how Mendeleev organized the elements into rows and columns in his periodic table. (page 127) 2. Define the periodic table (page 127) 3. What card game did Mendeleev use as a model for the periodic table? (page 127) 4. Why did Mendeleev leave spaces in his table? (page 128) 5. How was Mendeleev able to predict the properties of elements that had not yet been discovered? (page 128) 6. How did the discovery of new elements such as gallium demonstrate the usefulness of Mendeleev’s table? (page 129) 7. What determines the order of elements in the modern periodic table? (page 131) 8. What is a period on the periodic table? (page 131) 9. What is a group (family) on the periodic table? (page 131) 10. Describe periodic law. (page 131) 11. What two factors determine the atomic mass of an element? (page 134) 12. Name three categories that are used to classify the elements in the periodic table? (page 135) 13. Define a metal? (page 135) 14. What are transition metals? (page 136) 15. What are nonmetals? (page 136) Name ___________________ Period _____ 16. What are metalloids? (page 136) 17. What major change occurs as you move from left to right across the periodic table? (page 138) 18. What is a valence electron? Draw a SQUARE around each valence electron in the picture! (page 139) 19. Explain why elements in a group (family) have similar properties? (page139) 20. What is the relationship between an Alkali Metal’s location in Group 1A and its reactivity? (page 140) 21. What two Alkaline Earth Metals are essential elements in the human body? (page 141) 22. What element in the Boron Family Metal __________________ is the most abundant metal in the 1. Earth’s crust? Identify 2 ways in which 2. we use this metal (page 142) 23. What element in the Carbon Family exists in almost every compound in your body? (page 142) 24. What are two common elements from the Nitrogen Family found in fertilizers? (page 143) 25. What element from the Oxygen Family is the most abundant ELEMENT in the Earth’s crust? (page 143) 26. Despite their physical differences, what similar chemical property do all the Halogens share? (page 144) 27. Which group (family) of elements is the least reactive (most stable)? (page 145)