Refer to the periodic table and state the mass of 6.02 x 10²³ atoms of 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 4 Li B Na 19 55 87 2 IIA Fr Be 12 Mg 20 38 56 Ba 88 Ra 3 IIIB 21 Sc 39 57 Y La 89 Atomic number Symbol Ac Metals Semimetals Nonmetals 4 IVB 22 Ti 40 Zr 5 VB 72 23 41 Nb 73 Hf Ta 104 105 Rf Db Ce 90 Th -H 6 VIB 24 Cr 42 Mo 74 W 106 Sg 59 91 PERIODIC TABLE OF THE ELEMENTS Pa 7 VIIB 25 Mn 43 75 Re 60 Pr Nd 107 92 8 VIII U 26 44 108 Bh Hs Fe Ru 76 61 Pm 93 Np 9 VIII 27 Co 77 Ir 109 62 45 46 47 48 Rh Pd Ag Cd Sm 10 VIII 110 Mt Ds 94 28 Pu Ni 78 63 11 12 IB IIB 95 30 Cu Zn Am 29 79 Au 64 Eu Gd 111 Rg 96 Cm 80 Hg 112 Cn 65 97 Bk 13 IIIA 13 31 Al Ga 49 In 81 TI 113 Nh 66 98 Cf 14 15 16 IVA VA VIA 6 14 32 Ge 50 Sn 82 33 e As Pb 114 67 99 E Es 51 83 Bi 115 Mc 68 8 16 34 Se 52 S Te 84 Po 116 Lv 69 17 VIIA 9 17 cl 35 Br 53 85 At 117 Ts 70 18 VIIIA 2 He 10 Ne 18 Ar 36 54 Kr Xe 86 Rn 118 Og 71 Lu 100 101 102 103 Fm Md No Lr