Name Class Date. 3. Look at the chart. What is the symbol for potassium? a. Li b. K c. Cs d. Fr
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1 Skills Worksheet Directed Reading B Section: Grouping the Elements 1. What do atoms of elements in a group have that makes their properties similar? a. the same atomic mass b. the same number of protons c. the same number of outer level electrons d. the same total number of electrons 2. At the atomic level, what makes elements reactive? a. having a filled outer level b. exchanging or sharing electrons c. having the same number of electrons d. having the same number of protons GROUP 1: ALKALI METALS 3. Look at the chart. What is the symbol for potassium? a. Li b. K c. Cs d. Fr 4. How are the alkali metals similar? a. They are very reactive. b. They have few uses. c. They are so hard they cannot be cut. d. They are often stored in water. Holt Science and Technology 12 The Periodic Table
2 GROUP 2: ALKALINE-EARTH METALS 5. What is true about all of the alkaline-earth metals? a. They are have low density. b. They are less reactive than alkali metals are. c. They have three outer level electrons. d. They have few uses. 6. Look at the chart. Which element is not an alkaline-earth metal? a. magnesium b. calcium c. barium d. sodium GROUPS 3 12: TRANSITION METALS 7. Groups are read from top to bottom. What elements are in Group 3? a. Sc, Ti, V, Mn b. V, Nb, Ta, Db c. Sc, Y, La, Ac d. La, Hf, Ta, W Holt Science and Technology 13 The Periodic Table
3 Properties of Transition Metals 8. How would you describe most transition metals? a. poor conductor of electric current b. dull c. good conductor of thermal energy d. low density and melting points Lanthanides and Actinides 9. What word best describes the lathanides? a. radioactive b. unstable c. reactive d. dull 10. What word best describes the actinides? a. radioactive b. stable c. shiny d. reactive Holt Science and Technology 14 The Periodic Table
4 Read the words in the box. Read the sentences. Fill in each blank with the word or phrase that best completes the sentence. reactive oxygen hydrogen aluminum tin carbohydrates GROUP 13: BORON GROUP 11. All elements in the Boron Group are and solid at room temperature. 12. The most common element in the Boron Group is which is used to make airplane parts. GROUP 14: CARBON GROUP 13. Compounds of carbon, such as proteins, fats, and, are necessary for life on Earth. 14. The symbol Sn stands for the metal. GROUP 15: NITROGEN GROUP 15. Nitrogen can react with to make ammonia. GROUP 16: OXYGEN GROUP 16. In order for a substance to burn, it needs. Holt Science and Technology 15 The Periodic Table
5 GROUP 17: HALOGENS 17. What is made when a halogen reacts with a metal? a. a salt b. a compound c. a nonmetal d. an electron GROUP 18: NOBLE GASES 18. Look at the chart. How many nonmetals are in Group 18? a. three b. six c. four d. eight 19. Look at the chart. What element does the symbol Kr represent? a. argon b. helium c. neon d. krypton 20. What element helps light bulbs last longer? a. neon b. krypton c. argon d. xenon Holt Science and Technology 16 The Periodic Table
6 HYDROGEN 21. What is the symbol for hydrogen? a. Hy b. K c. H d. Hi 22. Which word or words describe hydrogen? a. colorless gas b. unreactive c. high density d. very rare 23. Where is hydrogen located on the periodic table? a. in Group 1 b. in Group 18 c. above Group 1 d. below Group 1 Holt Science and Technology 17 The Periodic Table
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