Z Symbol Element Protons Neutrons Nucleons R.A.M Metal, non-metal etc. Group Electron shells Block Electron subshells
1 H Hydrogen 1 0 1           1.0 hydrogen 01 1 s 1s1
2 He Helium 2 2 4           4.0 noble gas 18 2 p 1s2
3 Li Lithium 3 4 7           6.9 alkali metal 01 2.1 s [He] 2s1
4 Be Beryllium 4 5 9           9.0 alkaline-earth metal 02 2.2 s [He] 2s2
5 B Boron 5 6 11         10.8 semimetal 13 2.3 p [He] 2s22p1
6 C Carbon 6 6 12         12.0 non-metal 14 2.4 p [He] 2s22p2
7 N Nitrogen 7 7 14         14.0 non-metal 15 2.5 p [He] 2s22p3
8 O Oxygen 8 8 16         16.0 non-metal 16 2.6 p [He] 2s22p4
9 F Fluorine 9 10 19         19.0 non-metal 17 2.7 p [He] 2s22p5
10 Ne Neon 10 10 20         20.1 noble gas 18 2.8 p [He] 2s22p6
11 Na Sodium 11 12 23         23.0 alkali metal 01 2.8.1 s [Ne] 3s1
12 Mg Magnesium 12 12 24         24.3 alkaline-earth metal 02 2.8.2 s [Ne] 3s2
13 Al Aluminium 13 14 27         27.0 poor metal 13 2.8.3 p [Ne] 3s23p1
14 Si Silicon 14 14 28         28.1 semimetal 14 2.8.4 p [Ne] 3s23p2
15 P Phosphorus 15 16 31         31.0 non-metal 15 2.8.5 p [Ne] 3s23p3
16 S Sulphur 16 16 32         32.1 non-metal 16 2.8.6 p [Ne] 3s23p4
17 Cl Chlorine 17 18 35         35.5 non-metal 17 2.8.7 p [Ne] 3s23p5
18 Ar Argon 18 22 40         40.0 noble gas 18 2.8.8 p [Ne] 3s23p6
19 K Potassium 19 20 39         39.1 alkali metal 01 2.8.8.1 s [Ar] 4s1
20 Ca Calcium 20 20 40         40.1 alkaline-earth metal 02 2.8.8.2 s [Ar] 4s2
21 Sc Scandium 21 24 45         45.0 transition metal 03 2.8.9.2 d [Ar] 3d14s2
22 Ti Titanium 22 26 48         47.9 transition metal 04 2.8.10.2 d [Ar] 3d24s2
23 V Vanadium 23 28 51         50.9 transition metal 05 2.8.11.2 d [Ar] 3d34s2
24 Cr Chromium 24 28 52         52.0 transition metal 06 2.8.13.1 d [Ar] 3d54s1
25 Mn Manganese 25 30 55         54.9 transition metal 07 2.8.13.2 d [Ar] 3d54s2
26 Fe Iron 26 30 56         55.9 transition metal 08 2.8.14.2 d [Ar] 3d64s2
27 Co Cobalt 27 32 59         58.9 transition metal 09 2.8.15.2 d [Ar] 3d74s2
28 Ni Nickel 28 30 58         58.7 transition metal 10 2.8.16.2 d [Ar] 3d84s2
29 Cu Copper 29 34 63         63.6 transition metal 11 2.8.18.1 d [Ar] 3d104s1
30 Zn Zinc 30 34 64         65.4 transition metal 12 2.8.18.2 d [Ar] 3d104s2
31 Ga Gallium 31 38 69         69.7 poor metal 13 2.8.18.3 p [Ar] 3d104s24p1
32 Ge Germanium 32 42 74         72.6 semimetal 14 2.8.18.4 p [Ar] 3d104s24p2
33 As Arsenic 33 42 75         74.9 semimetal 15 2.8.18.5 p [Ar] 3d104s24p3
34 Se Selenium 34 46 80         79.0 semimetal 16 2.8.18.6 p [Ar] 3d104s24p4
35 Br Bromine 35 44 79         79.9 non-metal 17 2.8.18.7 p [Ar] 3d104s24p5
36 Kr Krypton 36 48 84         83.3 noble gas 18 2.8.18.8 p [Ar] 3d104s24p6
37 Rb Rubidium 37 48 85         85.5 alkali metal 01 2.8.18.8.1 s [Kr] 5s1
38 Sr Strontium 38 50 88         87.6 alkaline-earth metal 02 2.8.18.8.2 s [Kr] 5s2
39 Y Yttrium 39 50 89         88.9 transition metal 03 2.8.18.9.2 d [Kr] 4d15s2
40 Zr Zirconium 40 50 90         91.2 transition metal 04 2.8.18.10.2 d [Kr] 4d25s2
41 Nb Niobium 41 52 93         92.9 transition metal 05 2.8.18.12.1 d [Kr] 4d45s1
42 Mo Molybdenum 42 56 98         95.9 transition metal 06 2.8.18.13.1 d [Kr] 4d55s1
43 Tc Technetium 43 54 97         98.9 transition metal 07 2.8.18.14.1 d [Kr] 4d65s1
44 Ru Ruthenium 44 58 102       101.1 transition metal 08 2.8.18.15.1 d [Kr] 4d75s1
45 Rh Rhodium 45 58 103       102.9 transition metal 09 2.8.18.16.1 d [Kr] 4d85s1
46 Pd Palladium 46 60 106       106.4 transition metal 10 2.8.18.18 d [Kr] 4d10
47 Ag Silver 47 60 107       107.9 transition metal 11 2.8.18.18.1 d [Kr] 4d105s1
48 Cd Cadmium 48 66 114       112.4 transition metal 12 2.8.18.18.2 d [Kr] 4d105s2
49 In Indium 49 66 115       114.8 poor metal 13 2.8.18.18.3 p [Kr] 4d105s25p1
50 Sn Tin 50 70 120       118.7 poor metal 14 2.8.18.18.4 p [Kr] 4d105s25p2
51 Sb Antimony 51 70 121       121.8 semimetal 15 2.8.18.18.5 p [Kr] 4d105s25p3
52 Te Tellurium 52 78 130       127.6 semimetal 16 2.8.18.18.6 p [Kr] 4d105s25p4
53 I Iodine 53 74 127       126.9 non-metal 17 2.8.18.18.7 p [Kr] 4d105s25p5
54 Xe Xenon 54 78 132       131.3 noble gas 18 2.8.18.18.8 p [Kr] 4d105s25p6
55 Cs Caesium 55 78 133       132.9 alkali metal 01 2.8.18.18.8.1 s [Xe] 6s1
56 Ba Barium 56 82 138       137.3 alkaline-earth metal 02 2.8.18.18.8.2 s [Xe] 6s2
57 La Lanthanum 57 82 139       138.9 lanthanide 03 2.8.18.18.9.2 f [Xe] 4 f0 . 5 d1 . 6 s2
58 Ce Cerium 58 82 140       140.1 lanthanide 24 2.8.18.19.9.2 f [Xe] 5 d1 f1 . 6 s2
59 Pr Praseodymium 59 82 141       140.9 lanthanide 25 2.8.18.21.8.2 f [Xe] 5 d0 f3 . 6 s2
60 Nd Neodymium 60 82 142       144.2 lanthanide 26 2.8.18.22.8.2 f [Xe] 5 d0 f4 . 6 s2
61 Pm Promethium 61 84 145       146.9 lanthanide 27 2.8.18.23.8.2 f [Xe] 5 d0 f5 . 6 s2
62 Sm Samarium 62 90 152       150.4 lanthanide 28 2.8.18.24.8.2 f [Xe] 5 d0 f6 . 6 s2
63 Eu Europium 63 90 153       152.0 lanthanide 29 2.8.18.25.8.2 f [Xe] 5 d0 f7 . 6 s2
64 Gd Gadolinium 64 94 158       157.3 lanthanide 30 2.8.18.26.8.2 f [Xe] 5 d0 f8 . 6 s2
65 Tb Terbium 65 94 159       158.9 lanthanide 31 2.8.18.27.8.2 f [Xe] 5 d0 f9 . 6 s2
66 Dy Dysprosium 66 98 164       162.5 lanthanide 32 2.8.18.28.8.2 f [Xe] 5 d0 f10 . 6 s2
67 Ho Holmium 67 98 165       164.9 lanthanide 33 2.8.18.29.8.2 f [Xe] 5 d0 f11 . 6 s2
68 Er Erbium 68 100 168       167.3 lanthanide 34 2.8.18.30.8.2 f [Xe] 5 d0 f12 . 6 s2
69 Tm Thulium 69 100 169       168.9 lanthanide 35 2.8.18.31.8.2 f [Xe] 5 d0 f13 . 6 s2
70 Yb Ytterbium 70 104 174       173.0 lanthanide 36 2.8.18.32.8.2 f [Xe] 5 d0 f14 . 6 s2
71 Lu Lutetium 71 104 175       175.0 lanthanide 37 2.8.18.32.9.2 d [Xe] 5 d1 f14 . 6 s2
72 Hf Hafnium 72 108 180       178.5 transition metal 04 2.8.18.32.10.2 d [Xe] 5 d2 f14 . 6 s2
73 Ta Tantalum 73 108 181       181.0 transition metal 05 2.8.18.32.11.2 d [Xe] 5 d3 f14 . 6 s2
74 W Tungsten 74 110 184       183.9 transition metal 06 2.8.18.32.12.2 d [Xe] 5 d4 f14 . 6 s2
75 Re Rhenium 75 112 187       186.2 transition metal 07 2.8.18.32.13.2 d [Xe] 5 d5 f14 . 6 s2
76 Os Osmium 76 116 192       190.2 transition metal 08 2.8.18.32.14.2 d [Xe] 5 d6 f14 . 6 s2
77 Ir Iridium 77 116 193       192.2 transition metal 09 2.8.18.32.15.2 d [Xe] 5 d7 f14 . 6 s2
78 Pt Platinum 78 117 195       195.1 transition metal 10 2.8.18.32.17.1 d [Xe] 5 d9 f14 . 6 s1
79 Au Gold 79 118 197       197.0 transition metal 11 2.8.18.32.18.1 d [Xe] 5 d10 f14 . 6 s1
80 Hg Mercury 80 122 202       200.6 transition metal 12 2.8.18.32.18.2 d [Xe] 5 d10 f14 . 6 s2
81 Tl Thallium 81 124 205       204.4 poor metal 13 2.8.18.32.18.3 p [Xe] 5 d10 f14 . 6 s2 p1
82 Pb Lead 82 126 208       207.2 poor metal 14 2.8.18.32.18.4 p [Xe] 5 d10 f14 . 6 s2 p2
83 Bi Bismuth 83 126 209       209.0 poor metal 15 2.8.18.32.18.5 p [Xe] 5 d10 f14 . 6 s2 p3
84 Po Polonium 84 125 209       210.0 poor metal 16 2.8.18.32.18.6 p [Xe] 5 d10 f14 . 6 s2 p4
85 At Astatine 85 125 210       210.0 non-metal 17 2.8.18.32.18.7 p [Xe] 5 d10 f14 . 6 s2 p5
86 Rn Radon 86 136 222       222.0 noble gas 18 2.8.18.32.18.8 p [Xe] 5 d10 f14 . 6 s2 p6
87 Fr Francium 87 136 223       223.0 alkali metal 01 2.8.18.32.18.8.1 s  
88 Ra Radium 88 138 226       226.0 alkaline-earth metal 02 2.8.18.32.18.8.2 s  
89 Ac Actinium 89 138 227       224.0 actinide 03 2.8.18.32.18.9.2 f  
90 Th Thorium 90 142 232       232.0 actinide 24 2.8.18.32.18.10.2 f  
91 Pa Protactinium 91 140 231       231.0 actinide 25 2.8.18.32.20.9.2 f  
92 U Uranium 92 146 238       238.0 actinide 26 2.8.18.32.21.9.2 f  
93 Np Neptunium 93 144 237       237.1 actinide 27 2.8.18.32.22.9.2 f  
94 Pu Plutonium 94 150 244       239.1 actinide 28 2.8.18.32.24.8.2 f  
95 Am Americium 95 148 243       241.1 actinide 29 2.8.18.32.25.8.2 f  
96 Cm Curium 96 151 247       247.1 actinide 30 2.8.18.32.25.9.2 f  
97 Bk Berkelium 97 150 247       249.1 actinide 31 2.8.18.32.27.8.2 f  
98 Cf Californium 98 153 251       251.1 actinide 32 2.8.18.32.28.8.2 f  
99 Es Einsteinium 99 155 254       254.1 actinide 33 2.8.18.32.29.8.2 f  
100 Fm Fermium 100 157 257       257.1 actinide 34 2.8.18.32.30.8.2 f  
101 Md Mendelevium 101 157 258       258.1 actinide 35 2.8.18.32.31.8.2 f  
102 No Nobelium 102 153 255       255.0 actinide 36 2.8.18.32.32.8.2 f  
103 Lr Lawrencium 103 153 256       262.1 actinide 37 2.8.18.32.32.9.2 f  
104 Rf Rutherfordium 104 156 260       261.1 transition metal 04 2.8.18.32.32.10.2 d  
105 Db Dubnium 105 157 262       262.1 transition metal 05 2.8.18.32.32.11.2 d  
106 Sg Seaborgium 106 157 263       263.1 transition metal 06 2.8.18.32.32.12.2 d  
107 Bh Bohrium 107 155 262       262.1 transition metal 07 2.8.18.32.32.13.2 d  
108 Hs Hassium 108 157 265       265.0 transition metal 08 2.8.18.32.32.14.2 d  
109 Mt Meitnerium 109 157 266       266.0 transition metal 09 2.8.18.32.32.15.2 d  
110 Uun Ununnilium 110 unknown unknown unknown transition metal 10 2.8.18.32.32.17.1 d  
111 Uuu Unununium 111 unknown unknown unknown transition metal 11 2.8.18.32.32.18.1 d  
112 Uub Ununbium 112 unknown unknown unknown transition metal 12 2.8.18.32.32.18.2 d  
113 Uut Ununtrium 113 unknown unknown unknown poor metal 13 2.8.18.32.32.18.3 p  
114 Uuq Ununquadium 114 unknown unknown unknown poor metal 14 2.8.18.32.32.18.4 p  
115     115 unknown unknown unknown poor metal 15 2.8.18.32.32.18.5 p  
116 Uuh Ununhexium 116 unknown unknown unknown poor metal 16 2.8.18.32.32.18.6 p  
117     117 unknown unknown unknown non-metal 17 2.8.18.32.32.18.7 p  
118 Uuo Ununoctium 118 unknown unknown unknown noble gas 18 2.8.18.32.32.18.8 p