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5-8
95 Arsenic As 33 74 92 Astatine At 85 210 Barium Ba 56 137 34 Berkelium Bk 97 (247) Beryllium Be 4 9 01 Bismuth Bi 83 208
1
6-9
92 Astatine At 85 210 Barium Ba 56 137 34 Berkelium Bk 97 (247) Beryllium Be 4 9 01 Bismuth Bi 83 208 98 Bohrium Bh 107 (264) Boron B 5 10
1
7-10
34 Berkelium Bk 97 (247) Beryllium Be 4 9 01 Bismuth Bi 83 208 98 Bohrium Bh 107 (264) Boron B 5 10 81 Bromine Br 35 79
1
8-11
01 Bismuth Bi 83 208 98 Bohrium Bh 107 (264) Boron B 5 10 81 Bromine Br 35 79 91 Cadmium Cd 48 112
1
9-12
98 Bohrium Bh 107 (264) Boron B 5 10 81 Bromine Br 35 79 91 Cadmium Cd 48 112 40 Caesium Cs 55 132
1
10-13
81 Bromine Br 35 79 91 Cadmium Cd 48 112 40 Caesium Cs 55 132 91 Calcium Ca 20 40
1
11-14
91 Cadmium Cd 48 112 40 Caesium Cs 55 132 91 Calcium Ca 20 40 08 Californium Cf 98 251
1
12-15
40 Caesium Cs 55 132 91 Calcium Ca 20 40 08 Californium Cf 98 251 08 Carbon C 6 12
1
13-16
91 Calcium Ca 20 40 08 Californium Cf 98 251 08 Carbon C 6 12 01 Cerium Ce 58 140
1
14-17
08 Californium Cf 98 251 08 Carbon C 6 12 01 Cerium Ce 58 140 12 Chlorine Cl 17 35
1
15-18
08 Carbon C 6 12 01 Cerium Ce 58 140 12 Chlorine Cl 17 35 45 Chromium Cr 24 52
1
16-19
01 Cerium Ce 58 140 12 Chlorine Cl 17 35 45 Chromium Cr 24 52 00 Cobalt Co 27 58
1
17-20
12 Chlorine Cl 17 35 45 Chromium Cr 24 52 00 Cobalt Co 27 58 93 Copper Cu 29 63
1
18-21
45 Chromium Cr 24 52 00 Cobalt Co 27 58 93 Copper Cu 29 63 54 Curium Cm 96 247
1
19-22
00 Cobalt Co 27 58 93 Copper Cu 29 63 54 Curium Cm 96 247 07 Dubnium Db 105 (263) Dysprosium Dy 66 162
1
20-23
93 Copper Cu 29 63 54 Curium Cm 96 247 07 Dubnium Db 105 (263) Dysprosium Dy 66 162 50 Einsteinium Es 99 (252) Erbium Er 68 167
1
21-24
54 Curium Cm 96 247 07 Dubnium Db 105 (263) Dysprosium Dy 66 162 50 Einsteinium Es 99 (252) Erbium Er 68 167 26 Europium Eu 63 151
1
22-25
07 Dubnium Db 105 (263) Dysprosium Dy 66 162 50 Einsteinium Es 99 (252) Erbium Er 68 167 26 Europium Eu 63 151 96 Fermium Fm 100 (257
1
23-26
50 Einsteinium Es 99 (252) Erbium Er 68 167 26 Europium Eu 63 151 96 Fermium Fm 100 (257 10) Fluorine F 9 19
1
24-27
26 Europium Eu 63 151 96 Fermium Fm 100 (257 10) Fluorine F 9 19 00 Francium Fr 87 (223) Gadolinium Gd 64 157
1
25-28
96 Fermium Fm 100 (257 10) Fluorine F 9 19 00 Francium Fr 87 (223) Gadolinium Gd 64 157 25 Gallium Ga 31 69
1
26-29
10) Fluorine F 9 19 00 Francium Fr 87 (223) Gadolinium Gd 64 157 25 Gallium Ga 31 69 72 Germanium Ge 32 72
1
27-30
00 Francium Fr 87 (223) Gadolinium Gd 64 157 25 Gallium Ga 31 69 72 Germanium Ge 32 72 61 Gold Au 79 196
1
28-31
25 Gallium Ga 31 69 72 Germanium Ge 32 72 61 Gold Au 79 196 97 Hafnium Hf 72 178
1
29-32
72 Germanium Ge 32 72 61 Gold Au 79 196 97 Hafnium Hf 72 178 49 Hassium Hs 108 (269) Helium He 2 4
1
30-33
61 Gold Au 79 196 97 Hafnium Hf 72 178 49 Hassium Hs 108 (269) Helium He 2 4 00 Holmium Ho 67 164
1
31-34
97 Hafnium Hf 72 178 49 Hassium Hs 108 (269) Helium He 2 4 00 Holmium Ho 67 164 93 Hydrogen H 1 1
1
32-35
49 Hassium Hs 108 (269) Helium He 2 4 00 Holmium Ho 67 164 93 Hydrogen H 1 1 0079 Indium In 49 114
1
33-36
00 Holmium Ho 67 164 93 Hydrogen H 1 1 0079 Indium In 49 114 82 Iodine I 53 126
1
34-37
93 Hydrogen H 1 1 0079 Indium In 49 114 82 Iodine I 53 126 90 Iridium Ir 77 192
1
35-38
0079 Indium In 49 114 82 Iodine I 53 126 90 Iridium Ir 77 192 2 Iron Fe 26 55
1
36-39
82 Iodine I 53 126 90 Iridium Ir 77 192 2 Iron Fe 26 55 85 Krypton Kr 36 83
1
37-40
90 Iridium Ir 77 192 2 Iron Fe 26 55 85 Krypton Kr 36 83 80 Lanthanum La 57 138
1
38-41
2 Iron Fe 26 55 85 Krypton Kr 36 83 80 Lanthanum La 57 138 91 Lawrencium Lr 103 (262
1
39-42
85 Krypton Kr 36 83 80 Lanthanum La 57 138 91 Lawrencium Lr 103 (262 1) Lead Pb 82 207
1
40-43
80 Lanthanum La 57 138 91 Lawrencium Lr 103 (262 1) Lead Pb 82 207 19 Lithium Li 3 6
1
41-44
91 Lawrencium Lr 103 (262 1) Lead Pb 82 207 19 Lithium Li 3 6 94 Lutetium Lu 71 174
1
42-45
1) Lead Pb 82 207 19 Lithium Li 3 6 94 Lutetium Lu 71 174 96 Magnesium Mg 12 24
1
43-46
19 Lithium Li 3 6 94 Lutetium Lu 71 174 96 Magnesium Mg 12 24 31 Manganese Mn 25 54
1
44-47
94 Lutetium Lu 71 174 96 Magnesium Mg 12 24 31 Manganese Mn 25 54 94 Meitneium Mt 109 (268) Mendelevium Md 101 258
1
45-48
96 Magnesium Mg 12 24 31 Manganese Mn 25 54 94 Meitneium Mt 109 (268) Mendelevium Md 101 258 10 Mercury Hg 80 200
1
46-49
31 Manganese Mn 25 54 94 Meitneium Mt 109 (268) Mendelevium Md 101 258 10 Mercury Hg 80 200 59 Molybdenum Mo 42 95
1
47-50
94 Meitneium Mt 109 (268) Mendelevium Md 101 258 10 Mercury Hg 80 200 59 Molybdenum Mo 42 95 94 Neodymium Nd 60 144
1
48-51
10 Mercury Hg 80 200 59 Molybdenum Mo 42 95 94 Neodymium Nd 60 144 24 Neon Ne 10 20
1
49-52
59 Molybdenum Mo 42 95 94 Neodymium Nd 60 144 24 Neon Ne 10 20 18 Neptunium Np 93 (237
1
50-53
94 Neodymium Nd 60 144 24 Neon Ne 10 20 18 Neptunium Np 93 (237 05) Nickel Ni 28 58
1
51-54
24 Neon Ne 10 20 18 Neptunium Np 93 (237 05) Nickel Ni 28 58 71 Niobium Nb 41 92
1
52-55
18 Neptunium Np 93 (237 05) Nickel Ni 28 58 71 Niobium Nb 41 92 91 Nitrogen N 7 14
1
53-56
05) Nickel Ni 28 58 71 Niobium Nb 41 92 91 Nitrogen N 7 14 0067 Nobelium No 102 (259) Osmium Os 76 190
1
54-57
71 Niobium Nb 41 92 91 Nitrogen N 7 14 0067 Nobelium No 102 (259) Osmium Os 76 190 2 Oxygen O 8 16
1
55-58
91 Nitrogen N 7 14 0067 Nobelium No 102 (259) Osmium Os 76 190 2 Oxygen O 8 16 00 Palladium Pd 46 106
1
56-59
0067 Nobelium No 102 (259) Osmium Os 76 190 2 Oxygen O 8 16 00 Palladium Pd 46 106 4 Phosphorus P 15 30
1
57-60
2 Oxygen O 8 16 00 Palladium Pd 46 106 4 Phosphorus P 15 30 97 Platinum Pt 78 195
1
58-61
00 Palladium Pd 46 106 4 Phosphorus P 15 30 97 Platinum Pt 78 195 09 Plutonium Pu 94 (244) Polonium Po 84 210 Potassium K 19 39
1
59-62
4 Phosphorus P 15 30 97 Platinum Pt 78 195 09 Plutonium Pu 94 (244) Polonium Po 84 210 Potassium K 19 39 10 Praseodymium Pr 59 140
1
60-63
97 Platinum Pt 78 195 09 Plutonium Pu 94 (244) Polonium Po 84 210 Potassium K 19 39 10 Praseodymium Pr 59 140 91 Promethium Pm 61 (145) Protactinium Pa 91 231
1
61-64
09 Plutonium Pu 94 (244) Polonium Po 84 210 Potassium K 19 39 10 Praseodymium Pr 59 140 91 Promethium Pm 61 (145) Protactinium Pa 91 231 04 Radium Ra 88 (226) Radon Rn 86 (222) Rhenium Re 75 186
1
62-65
10 Praseodymium Pr 59 140 91 Promethium Pm 61 (145) Protactinium Pa 91 231 04 Radium Ra 88 (226) Radon Rn 86 (222) Rhenium Re 75 186 2 Rhodium Rh 45 102
1
63-66
91 Promethium Pm 61 (145) Protactinium Pa 91 231 04 Radium Ra 88 (226) Radon Rn 86 (222) Rhenium Re 75 186 2 Rhodium Rh 45 102 91 Rubidium Rb 37 85
1
64-67
04 Radium Ra 88 (226) Radon Rn 86 (222) Rhenium Re 75 186 2 Rhodium Rh 45 102 91 Rubidium Rb 37 85 47 Ruthenium Ru 44 101
1
65-68
2 Rhodium Rh 45 102 91 Rubidium Rb 37 85 47 Ruthenium Ru 44 101 07 Rutherfordium Rf 104 (261) Samarium Sm 62 150
1
66-69
91 Rubidium Rb 37 85 47 Ruthenium Ru 44 101 07 Rutherfordium Rf 104 (261) Samarium Sm 62 150 35 Scandium Sc 21 44
1
67-70
47 Ruthenium Ru 44 101 07 Rutherfordium Rf 104 (261) Samarium Sm 62 150 35 Scandium Sc 21 44 96 Seaborgium Sg 106 (266) Selenium Se 34 78
1
68-71
07 Rutherfordium Rf 104 (261) Samarium Sm 62 150 35 Scandium Sc 21 44 96 Seaborgium Sg 106 (266) Selenium Se 34 78 96 Silicon Si 14 28
1
69-72
35 Scandium Sc 21 44 96 Seaborgium Sg 106 (266) Selenium Se 34 78 96 Silicon Si 14 28 08 Silver Ag 47 107
1
70-73
96 Seaborgium Sg 106 (266) Selenium Se 34 78 96 Silicon Si 14 28 08 Silver Ag 47 107 87 Sodium Na 11 22
1
71-74
96 Silicon Si 14 28 08 Silver Ag 47 107 87 Sodium Na 11 22 99 Strontium Sr 38 87
1
72-75
08 Silver Ag 47 107 87 Sodium Na 11 22 99 Strontium Sr 38 87 62 Sulphur S 16 32
1
73-76
87 Sodium Na 11 22 99 Strontium Sr 38 87 62 Sulphur S 16 32 06 Tantalum Ta 73 180
1
74-77
99 Strontium Sr 38 87 62 Sulphur S 16 32 06 Tantalum Ta 73 180 95 Technetium Tc 43 (98
1
75-78
62 Sulphur S 16 32 06 Tantalum Ta 73 180 95 Technetium Tc 43 (98 91) Tellurium Te 52 127
1
76-79
06 Tantalum Ta 73 180 95 Technetium Tc 43 (98 91) Tellurium Te 52 127 60 Terbium Tb 65 158
1
77-80
95 Technetium Tc 43 (98 91) Tellurium Te 52 127 60 Terbium Tb 65 158 92 Thallium Tl 81 204
1
78-81
91) Tellurium Te 52 127 60 Terbium Tb 65 158 92 Thallium Tl 81 204 37 Thorium Th 90 232
1
79-82
60 Terbium Tb 65 158 92 Thallium Tl 81 204 37 Thorium Th 90 232 04 Thulium Tm 69 168
1
80-83
92 Thallium Tl 81 204 37 Thorium Th 90 232 04 Thulium Tm 69 168 93 Tin Sn 50 118
1
81-84
37 Thorium Th 90 232 04 Thulium Tm 69 168 93 Tin Sn 50 118 69 Titanium Ti 22 47
1
82-85
04 Thulium Tm 69 168 93 Tin Sn 50 118 69 Titanium Ti 22 47 88 Tungsten W 74 183
1
83-86
93 Tin Sn 50 118 69 Titanium Ti 22 47 88 Tungsten W 74 183 85 Ununbium Uub 112 (277) Ununnilium Uun 110 (269) Unununium Uuu 111 (272) Uranium U 92 238
1
84-87
69 Titanium Ti 22 47 88 Tungsten W 74 183 85 Ununbium Uub 112 (277) Ununnilium Uun 110 (269) Unununium Uuu 111 (272) Uranium U 92 238 03 Vanadium V 23 50
1
85-88
88 Tungsten W 74 183 85 Ununbium Uub 112 (277) Ununnilium Uun 110 (269) Unununium Uuu 111 (272) Uranium U 92 238 03 Vanadium V 23 50 94 Xenon Xe 54 131
1
86-89
85 Ununbium Uub 112 (277) Ununnilium Uun 110 (269) Unununium Uuu 111 (272) Uranium U 92 238 03 Vanadium V 23 50 94 Xenon Xe 54 131 30 Ytterbium Yb 70 173
1
87-90
03 Vanadium V 23 50 94 Xenon Xe 54 131 30 Ytterbium Yb 70 173 04 Yttrium Y 39 88
1
88-91
94 Xenon Xe 54 131 30 Ytterbium Yb 70 173 04 Yttrium Y 39 88 91 Zinc Zn 30 65
1
89-92
30 Ytterbium Yb 70 173 04 Yttrium Y 39 88 91 Zinc Zn 30 65 37 Zirconium Zr 40 91
1
90-93
04 Yttrium Y 39 88 91 Zinc Zn 30 65 37 Zirconium Zr 40 91 22 Element Symbol Atomic Molar Number mass/ (g mol–1) The value given in parenthesis is the molar mass of the isotope of largest known half-life
1
91-94
91 Zinc Zn 30 65 37 Zirconium Zr 40 91 22 Element Symbol Atomic Molar Number mass/ (g mol–1) The value given in parenthesis is the molar mass of the isotope of largest known half-life Elements, their Atomic Number and Molar Mass APPENDIX I Rationalised 2023-24 142 Chemistry Common Unit of Mass and Weight 1 pound = 453
1
92-95
37 Zirconium Zr 40 91 22 Element Symbol Atomic Molar Number mass/ (g mol–1) The value given in parenthesis is the molar mass of the isotope of largest known half-life Elements, their Atomic Number and Molar Mass APPENDIX I Rationalised 2023-24 142 Chemistry Common Unit of Mass and Weight 1 pound = 453 59 grams 1 pound = 453
1
93-96
22 Element Symbol Atomic Molar Number mass/ (g mol–1) The value given in parenthesis is the molar mass of the isotope of largest known half-life Elements, their Atomic Number and Molar Mass APPENDIX I Rationalised 2023-24 142 Chemistry Common Unit of Mass and Weight 1 pound = 453 59 grams 1 pound = 453 59 grams = 0
1
94-97
Elements, their Atomic Number and Molar Mass APPENDIX I Rationalised 2023-24 142 Chemistry Common Unit of Mass and Weight 1 pound = 453 59 grams 1 pound = 453 59 grams = 0 45359 kilogram 1 kilogram = 1000 grams = 2
1
95-98
59 grams 1 pound = 453 59 grams = 0 45359 kilogram 1 kilogram = 1000 grams = 2 205 pounds 1 gram = 10 decigrams = 100 centigrams = 1000 milligrams 1 gram = 6
1
96-99
59 grams = 0 45359 kilogram 1 kilogram = 1000 grams = 2 205 pounds 1 gram = 10 decigrams = 100 centigrams = 1000 milligrams 1 gram = 6 022 ´ 1023 atomic mass units or u 1 atomic mass unit = 1
1
97-100
45359 kilogram 1 kilogram = 1000 grams = 2 205 pounds 1 gram = 10 decigrams = 100 centigrams = 1000 milligrams 1 gram = 6 022 ´ 1023 atomic mass units or u 1 atomic mass unit = 1 6606 ´ 10–24 gram 1 metric tonne = 1000 kilograms = 2205 pounds Common Unit of Volume 1 quart = 0
1
98-101
205 pounds 1 gram = 10 decigrams = 100 centigrams = 1000 milligrams 1 gram = 6 022 ´ 1023 atomic mass units or u 1 atomic mass unit = 1 6606 ´ 10–24 gram 1 metric tonne = 1000 kilograms = 2205 pounds Common Unit of Volume 1 quart = 0 9463 litre 1 litre = 1
1
99-102
022 ´ 1023 atomic mass units or u 1 atomic mass unit = 1 6606 ´ 10–24 gram 1 metric tonne = 1000 kilograms = 2205 pounds Common Unit of Volume 1 quart = 0 9463 litre 1 litre = 1 056 quarts 1 litre = 1 cubic decimetre = 1000 cubic centimetres = 0
1
100-103
6606 ´ 10–24 gram 1 metric tonne = 1000 kilograms = 2205 pounds Common Unit of Volume 1 quart = 0 9463 litre 1 litre = 1 056 quarts 1 litre = 1 cubic decimetre = 1000 cubic centimetres = 0 001 cubic metre 1 millilitre = 1 cubic centimetre = 0
1
101-104
9463 litre 1 litre = 1 056 quarts 1 litre = 1 cubic decimetre = 1000 cubic centimetres = 0 001 cubic metre 1 millilitre = 1 cubic centimetre = 0 001 litre = 1
1
102-105
056 quarts 1 litre = 1 cubic decimetre = 1000 cubic centimetres = 0 001 cubic metre 1 millilitre = 1 cubic centimetre = 0 001 litre = 1 056 ´ 10-3 quart 1 cubic foot = 28
1
103-106
001 cubic metre 1 millilitre = 1 cubic centimetre = 0 001 litre = 1 056 ´ 10-3 quart 1 cubic foot = 28 316 litres = 29
1
104-107
001 litre = 1 056 ´ 10-3 quart 1 cubic foot = 28 316 litres = 29 902 quarts = 7