Back Print Name Class Date Activity Vocabulary Activity Atomic Anagrams After you finish reading the chapter, try this puzzle. Use the definitions below to unscramble the vocabulary words. 1. weighted average of the mass of all naturally occurring isotopes of the same element MICTOA SAMS _______________________________________________________ 2. the smallest unit of an element that maintains the properties of an element MOATS ______________________________________________________________ 3. positively charged particle in the atom TORPNO ____________________________________________________________ 4. made up of protons and neutrons UCSELUN ___________________________________________________________ 5. particle in the atom that has no charge TRONUNE ___________________________________________________________ 6. atoms with the same number of protons but different numbers of neutrons SOOTPIES ___________________________________________________________ 7. negatively charged particle in the atom CLEENROT __________________________________________________________ 8. number of protons in a nucleus MICOTA BRUMEN ____________________________________________________ 9. regions where electrons are likely to be found RENECTOL SCUDLO _________________________________________________ 10. SI unit used to express the mass of atomic particles TMCOAI SASM NTUI__________________________________________________ 11. sum of protons and neutrons SAMS BRUNEM ______________________________________________________ Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt Science and Technology 51 Introduction to Atoms Back Print TEACHER RESOURCE PAGE Vocabulary Activity CONCEPT MAPPING 19. a. neutrons, b. density, c. strong force, d. electrons, e. charges, f. electromagnetic force 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Chapter Test C 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. A D D C A B C D B A C C D A B electrons nucleus electron-cloud atoms protons isotopes strong gravitational electromagnetic atomic mass atoms proton nucleus neutron isotopes electron atomic number electron clouds atomic mass unit mass number SciLinks Activity 1. It would weigh as much as a gallon 2. 3. 4. 5. 6. 7. 8. of milk. The masses are almost the same. 90 about 25 quarks, three 1932 three in each neutron and proton Particles called gluons hold quarks together. Standardized Test Preparation READING Passage 1 1. B 2. F Passage 2 1. A 2. H INTERPRETING GRAPHICS 1. B 2. G 3. D MATH 1. 2. 3. 4. B H A I Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt Science and Technology 65 Introduction to Atoms