1 IA 1 H Hydrogen 1.01 Atomic number Element symbol Element name Atomic mass VIIIA 1 H 1.01 IIA IIIA IVA VA VIA VIIA 2 He 4.00 Metalloids 3 Li 6.94 4 Be 9.01 5 B 10.81 6 C 12.01 7 N 14.01 8 O 16.00 9 F 19.00 10 Ne 20.18 11 Na 22.99 12 Mg 24.31 IIIB IVB VB VIB VIIB VIIIB IB IIB 13 Al 26.98 14 Si 28.09 15 P 30.97 16 S 32.07 17 Cl 35.45 18 Ar 39.95 19 K 39.10 20 Ca 40.08 21 Sc 44.96 22 Ti 47.88 23 V 50.94 24 Cr 52.00 25 Mn 54.94 26 Fe 55.85 27 Co 58.93 28 Ni 58.69 29 Cu 63.55 30 Zn 65.39 31 Ga 69.72 32 Ge 72.59 33 As 74.92 34 Se 78.96 35 Br 79.90 36 Kr 83.80 37 Rb 85.47 38 Sr 87.62 39 Y 88.91 40 Zr 91.22 41 Nb 92.91 42 Mo 95.94 43 Tc (99) 44 Ru 101.07 45 Rh 102.91 46 Pd 106.42 47 Ag 107.87 48 Cd 112.41 49 In 114.82 50 Sn 118.71 51 Sb 121.75 52 Te 127.60 53 I 126.90 54 Xe 131.29 55 Cs 132.91 56 Ba 137.33 57 La 138.91 72 Hf 178.49 73 Ta 180.95 74 W 183.85 75 Re 186.91 76 Os 190.23 77 Ir 192.22 78 Pt 195.08 79 Au 196.97 80 Hg 200.59 81 Tl 204.38 82 Pb 207.2 83 Bi 208.98 84 Po (209) 85 At (210) 86 Rn (222) 87 Fr (223) 88 Ra (226) 89 Ac (227) 104 Rf (261) 105 Db (262) 106 Sg (263) 107 Bh (262) 108 Hs (265) 109 Mt (266) Lanthanide series 58 Ce 140.12 59 Pr 140.91 60 Nd 144.24 61 Pm (147) 62 Sm 150.36 63 Eu 151.97 64 Gd 157.25 65 Tb 158.93 66 Dy 162.50 67 Ho 164.93 68 Er 167.26 69 Tm 168.93 70 Yb 173.04 71 Lu 174.97 Actinide series 90 Th (232) 91 Pa (231) 92 U (238) 93 Np (237) 94 Pu (244) 95 Am (243) 96 Cm (243) 97 Bk (247) 98 Cf (251) 99 Es (252) 100 Fm (257) 101 Md (258) 102 No (259) 103 Lr (260)
Spring 2015 Chem2A Test 1 Name Score /150 MULTIPLE CHOICE. 3 pts each 1) Which one of the following illustrations best represents a pure compound? 1) A) B) C) D) 2) Calculate 2.46 mg = A) 0.000246 g B) 2460 g C) 0.00246 g D) 0.0246 g 2) 3) Calculate 2.46 kg = A) 0.0246 g B) 0.000246 g C) 2460 g D) 0.00246 g 3) 4) Solve with proper number of significant figure for 12.63 + 1.5 + 0.253 = A) 14.38 B) 14.383 C) 14 D) 14.4 4) 5) How many significant figures should be included in the answer to the following calculation? 3.48 +2.3 2.470 A) 3 B) 1 C) 2 D) 4 5) 6) The approximate radius of gold atom is 0.0000000001441 m, expressed in proper scientific notation the number as A) 1.441 1010 m B) 1.441 109 m C) 1.441 10-9 m D) 1.441 10-10 m 6) 7) The average distance between the Sun and the Earth is 149,600,000,000 m, expressed in proper scientific notation the number as A) 1.496 1011 m B) 1.496 1010 m C) 1.496 10-11 m D) 1.496 10-10 m 7) 8) In the experiment to determine the density of an unknown liquid, the volume and the mass of the liquid were 9.89 ml and 8.75 g. The density of the liquid is A) 1.13 g/ml B) not enough information C) 8.65 g/ml D) 0.885 g/ml 8) 9) One summer afternoon the temperature at Fullerton, California, reached 102 F. It equals A) 84 C B) 39 C C) 102 C D) 39 K 9) A 1
10) What is the volume, in milliliters, of 50.0 g of a liquid if its density is 1.20 g/ml? A) 75.0 ml B) 41.7 ml C) 60.0 ml D) 32.1 ml 10) 11) What is the mass, in grams, of 30.0 ml of a liquid if its density is 1.20 g/ml? A) 30.0 g B) 36.0 g C) 36 g D) 1.20 g 11) 12) Which element is most similar to Carbon? A) Arsenic B) Silicon C) Nitrogen D) Sulfur 12) 13) Neutral atoms of isotopes of an element must have different A) Number of electrons B) Atomic numbers C) Number of protons D) Number of neutrons 13) 14) The numbers of protons and neutrons in an atom of 238 92 U are A) 92, 143 B) 92, 238 C) 238, 92 D) 92, 146 15) Which one of the following shells has the lowest energy? A) 3 B) 2 C) 4 D) 1 14) 15) 16) Which one of the following subshells has the highest energy? A) 2p B) 2s C) 4f D) 1s E) 3d 16) 17) The correct electron configuration for the phosphorus atom is A) 1s22s22p63p5 B) 1s22s22p63s3 C) 1s22s22p5 D) 1s22s22p63s23p3 18) Which sublevel will contain electrons with the lowest energy? A) 3d B) 3p C) 4s D) 3s 17) 18) 19) What is the maximum number of electrons that can occupy the 4f sublevel? A) 14 B) 6 C) 8 D) 10 19) 20) The number of orbitals exist in the third principal energy level is A) 6 B) 9 C) 3 D) 4 20) 21) The correct orbital diagram for an oxygen atom at its ground state is A) B) C) 3s D) 21) 22) Classify the element with the electron configuration [Ne]3s23p6 A) Alkaline earth metal B) Halogen C) Noble gas D) Alkali metal 22) 23) Which of the following shows the correct order of atomic radii from small to large? A) Li, C, O, Na B) O, C, Li, Na, C) Na, Li, C, O D) Na, O, C, Li 23) A 2
24) Which one of the following electron configurations presents 3 valence electrons? A) 1s22s22p63s23p64s23d104p3 B) 1s22s22p63s23p64s23d104p1 C) 1s22s22p63s23p64s23d3 D) 1s22s22p63s23p64s23d104p3 25) Which of the following elements shows the strongest metallic characteristics? A) Ca B) Mg C) Si D) K 24) 25) 26) Ionization energy is the energy required to remove an electron from an atom. Which of the following atoms has the highest ionization energy? A) Na B) Ca C) Mg D) Be 26) 27) Which one of the following illustration represents a d orbital 27) A) B) C) D) 28) Which of the following is NOT an ionic compound? A) NiCl3 B) NCl3 C) NaCl D) NdCl3 28) 29) What is the formula of iron(iii) nitrate? A) Fe(NO2)3 B) Fe(NO3)2 C) Fe3NO3 D) Fe(NO3)3 29) 30) The name of compound FePO4? A) iron phosphate B) iron(ii) phosphate C) iron(iii) phosphate D) iron phosphide 31) What is the formula of sodium phosphate? A) NaPO B) NaPO4 C) Na3PO4 D) Na3P 30) 31) 32) What is the formula of calcium nitride? A) Ca(NO3)2 B) Ca3N2 C) CaNO3 D) CaN 32) PROBLEMS. Show work with proper Significant Figures and Units to receive credit. 10 pts for each question unless otherwise noted. 33) (6 pts) Write the electron configuration for a chlorine (example, 1s22s1) A 3
34) (18 pts) Write formula for the following compounds. Nickel(II) chloride iron(iii) sulfate copper(i) phosphate nitric acid potassium bicarbonate aluminum nitrate 35) (12 pts) Name the following compounds: ZnCO3 Mg(C2H3O2)2 Hg2S Mn3(PO 4 )2 36) (8 pts) Complete the following conversion: 1,680 m =? in 2.50 mg =? kg 37) (10 pts) Calculate the mass of gasoline, in grams, required to fill a 5.0-gal tank. (Density of gasoline = 0.755 g/ml, 1 gal = 3.78 L) A 4