Refer to the periodic table and state the atomic mass (in amu) of one atom for each of the following metals.

(a) Sodium

(b) Strontium

(c) Silicon

(d) Selenium.

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2 3 4 av 6 3 7 11 1 IA 37 5 Rb Li Na 19 55 87 Fr 4 2 IIA Be 12 Mg 20 38 56 Ba 88 Ra 3 IIIB 21 Sc 39 57 Y La 89 Ac Atomic number Symbol Metals Semimetals Nonmetals 4 IVB 22 Ti 40 Zr 5 VB 72 23 41 Nb 73 Hf Ta Ce 90 -H Th 6 VIB 24 Cr 42 Mo 74 W 59 91 PERIODIC TABLE OF THE ELEMENTS 7 VIIB Pa 25 Mn 43 75 60 Pr Nd Re 92 8 VIII U 26 44 Fe Ru 76 61 104 105 106 107 108 109 110 Rf Db Sg Bh Hs Mt D Pm 93 9 VIII Np 27 Co 77 Ir 62 Sm 10 VIII 45 46 47 Rh Pd Ag 94 28 Pu Ni 78 63 11 IB 29 95 Cu 79 Au 111 64 Eu Gd Rg 96 Am Cm 12 13 IIB 30 Zn 48 Cd 80 Hg 112 Cn 65 97 13 IIIA Bk 31 Al Ga 49 In 81 TI 113 Nh 66 98 Cf 14 15 16 IVA VA VIA 6 14 50 82 Pb 32 33 34 Ge As Se 114 67 99 E 15 Es 51 83 Bi 115 Mc 68 8 16 52 S Te 84 Po 116 Lv 69 17 VIIA 9 17 cl 35 Br 53 85 At 117 Ts 70 100 101 102 Fm Md No 18 VIIIA 2 He 10 Ne 18 Ar 36 Kr 54 Xe 86 Rn 118 Og 71 Lu 103 Lr