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Name =%:= ~ 0 Class Date ~ Direc,tedReading fQr Content Mastery Overview Properties of Atomsandthe Periodic Table' Directions: Completethe conceptmap using the terms in the list below. Termscanbeusedmorethan once. protons' electrons periodictable neutrons Atoms have a mass number equal to the sum of are made up of ~ ~ are organized as elements in the 5. and .J and 6 and 0 .5 <Ii Q) °2 '" Co E 0 (.) s: '" c'iJ 0 ::E Q) .s .... 0 c 0 OJ os: '6 '" s: c~.~ Directions: complete thefollowingsentences byunderlining thecorrect wordsinpar~ntheses. 7. An element is matter that is composed of one type of (atom/quark). 8. The unit of measurement used for atomic particles is the (atom size/atomic mass unit). '" c'iJ 0 ::E "Q) 0 0 c Q) a @ 1:: "" . 0 (.) 9. Atoms of the same element that have different nuIribers of neutrons are called .(isotopes/ electron clouds). 10: In the periodic table, elements are arranged by increasing atomic (power/number). 11. An electron dot diagram usesthe symbol of an element and dots to represent the (quarks/electrons) in the outer energy level. "t Properties ofAtomsandthePeriodic Table 19 Name -~ Date -. ~ Directed Reading for Content Mastery Class Sed ion 1 . Structule,oftfte Atom Sedion2. MassesofAtoms 't Directions: Usethetermsbelowto completethefollowingparagraphsaboutatoms,atomicmass,and isotopes.Termsmaybeusedmorethanonce. six number n~utron(s) electrons proton(s) isotopes mass quarks The electron has very little mass compared to the 2. . The mass of the atom many 3. electron'cloud sixprotons 1. or depends on the nucleus and how and 4. it has.The sum of the protons and neutrons is the mass 5. of an atom. The number of neutrons in an atom canbe found by subtracting the atomic number from the 6. number. The massof the atom is sosmall that there is a measure called the atomic 8. 7. unit designated by amu. and9. of 10. make up the nucleusand are made up . There are 11. t uniquely are found in an area around the nucleus called different quarks. 12. the 13. . The nuclei of all atoms of a given element always have the same number of 14. . They will also have the same number of 15. around-the nucleus. Some atoms-may have more or fewer 16. than will other atoms of the same element Atoms of the same element with different numbers of neutrons are calledTt~ atom of carbon must contain 18. . Every but some contain six neutrons and U E ui <l) '2 '" c. E 0 u J: ~ '" c!; " 2 <l) £ '0 c:: 0 'in ';: 'C '" J: ~ others have eight neutrons. c!; " 2'<l) 0 " c:: <l) C3 I§) :c 110 ~0 u tJ 20 PropertiesofAtomsandthe PeriodicTable Date Name ~ ~ Directed Reading for Content Mastery KeyTerms PropertiesofAtomsandthe t PeriodicTable Directions: Matchthetermin Column/I withthe definitioninColiJmn I. Writetheletterofthe correcttermin theblankat the/eft. Column I Column II 1. sum of the number of protons and neutrons in the nucleus 2. region around the nucleus where the electrons are found 3. positivelycharged center of an atom a. nucleus b. electrons c. protons d. neutrons 4. vertical column in the periodic table 5. neutral particlesoin'thenucleus of an atom 6. weighted averagemass of the mixture of its isotopes 7. positivelycharged particles in an atom 8. table of the elements arranged, according to repeated changes in properties 9. represents the electrons in the outer energy levelof an element 10. negativelycharged particles in an atom 11. atoms of the same element that have different numbers of neutrons 12. number of protons in an atom's nucleus e. quark f. atomic number g. mass number h. isotope i. average atomic mass j. electron cloud. k. periodic table 1. atom m. atomic mass unit 13. horizontal row in the periodic table n. group 14. smallest known particl~ that makes up protons and neutrons o. electron dot diagram 15. the smallest peice of matter that still retains the properties of the element p. period 16~ developed an early periodic chart t oj .= vi w '2 '" c. E 0 u s: ~ '" ~" :::;: w :5 '0 "0 '(jj ';:; '5 '" q. Dmitri Mendeleev s: ~ '" ~" :::;: 'w 0" "w C3 @ ~ .I:: "" ';: 15: 0 u 17. approximately 1.67 x lO~24g tJ 22 Properties of Atoms and the Periodic Table ---- ~ Class .~CTIO~ ~ Date Enrichment an Element's Predicting.. t Group and Period Severalscientists,including Newlands, Meyer, and Mendeleevworked on classificationsystems that grouped elements accordingto their properties. They found that these properties repeated in a regular or periodic manner. This fact was used to predict properties of undiscovered elements. Reviewelectron arrangement from your textbook.In Table I, write.the maximum number of electrons that can fill each energy level on the blanks in the table heading. Write the total number of electrons for each element in the first column labeled Total.For each element, assignthe correct number of electrons to each energy level. Complete Table2 by using the information from the six elementsstudied. . . Table1 Electrons Element. Total Level 1 Level 3 Level 2 1. Argon 2. Carbon 3. Helium . 4. Lithium t 5. Silicon 6. Sodium <> E uj ,~ (ij a. E 0 Table2 "I Element Energy level Number of Located in period u Located in group outer electrons' J: ;!: '" <'3 0 . 7. Ar ::;: " -<5 0 8. C c: 0 'iij ';; :0 9. He 10. Li '" J: - 11. Si :!. Iii ~ '. 0 ::;: 'II> 0 0 c: II> a @ 12. Na s:: uo 't: iJ: 0 u 13. How is the element's period related to the number of energy levels over which its electronsare spread? 14. How can you predict an element's group and period? 32 Properties of Atoms and the Periodic Table f)