Berkelium (Bk) is a chemical element of the periodic table, located in the period 7, and has the atomic number 97. It is the ninth element in the actinide series. It is a soft, silvery-white metal which is named after the city of Berkeley, California, where it was first made. It is the fifth transuranium element and is counted as one of the radioactive elements.
| group | ⇨ | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| period | ⇩ | ||||||||||||||||||
| 1 | 1 H  Hydrogen |
2 He  Helium |
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| 2 | 3 Li  Lithium |
4 Be  Beryllium |
5 B  Boron |
6 C  Carbon |
7 N  Nitrogen |
8 O  Oxygen |
9 F  Fluorine |
10 Ne  Neon |
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| 3 | 11 Na  Sodium |
12 Mg  Magnesium |
13 Al  Aluminium |
14 Si  Silicon |
15 P  Phosphorus |
16 S  Sulfur |
17 Cl  Chlorine |
18 Ar  Argon |
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| 4 | 19 K  Potassium |
20 Ca  Calcium |
21 Sc  Scandium |
22 Ti  Titanium |
23 V  Vanadium |
24 Cr  Chromium |
25 Mn  Manganese |
26 Fe  Iron |
27 Co  Cobalt |
28 Ni  Nickel |
29 Cu  Copper |
30 Zn  Zinc |
31 Ga  Gallium |
32 Ge  Germanium |
33 As  Arsenic |
34 Se  Selenium |
35 Br  Bromine |
36 Kr  Krypton |
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| 5 | 37 Rb  Rubidium |
38 Sr  Strontium |
39 Y  Yttrium |
40 Zr  Zirconium |
41 Nb  Niobium |
42 Mo  Molybdenum |
43 Tc  Technetium |
44 Ru  Ruthenium |
45 Rh  Rhodium |
46 Pd  Palladium |
47 Ag  Silver |
48 Cd  Cadmium |
49 In  Indium |
50 Sn  Tin |
51 Sb  Antimony |
52 Te  Tellurium |
53 I  Iodine |
54 Xe  Xenon |
|
| 6 | 55 Cs  Caesium |
56 Ba  Barium |
72 Hf  Hafnium |
73 Ta  Tantalum |
74 W  Tungsten |
75 Re  Rhenium |
76 Os  Osmium |
77 Ir  Iridium |
78 Pt  Platinum |
79 Au  Gold |
80 Hg  Mercury |
81 Tl  Thallium |
82 Pb  Lead |
83 Bi  Bismuth |
84 Po  Polonium |
85 At  Astatine |
86 Rn  Radon |
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| 7 | 87 Fr  Francium |
88 Ra  Radium |
104 Rf  Rutherfordium |
105 Db  Dubnium |
106 Sg  Seaborgium |
107 Bh  Bohrium |
108 Hs  Hassium |
109 Mt  Meitnerium |
110 Ds  Darmstadtium |
111 Rg  Roentgenium |
112 Cn  Copernicium |
113 Nh  Nihonium |
114 Fl  Flerovium |
115 Mc  Moscovium |
116 Lv  Livermorium |
117 Ts  Tennessine |
118 Og  Oganesson |
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| 57 La  Lanthanum |
58 Ce  Cerium |
59 Pr  Praseodymium |
60 Nd  Neodymium |
61 Pm  Promethium |
62 Sm  Samarium |
63 Eu  Europium |
64 Gd  Gadolinium |
65 Tb  Terbium |
66 Dy  Dysprosium |
67 Ho  Holmium |
68 Er  Erbium |
69 Tm  Thulium |
70 Yb  Ytterbium |
71 Lu  Lutetium |
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| 89 Ac  Actinium |
90 Th  Thorium |
91 Pa  Protactinium |
92 U  Uranium |
93 Np  Neptunium |
94 Pu  Plutonium |
95 Am  Americium |
96 Cm  Curium |
97 Bk Berkelium |
98 Cf  Californium |
99 Es  Einsteinium |
100 Fm  Fermium |
101 Md  Mendelevium |
102 No  Nobelium |
103 Lr  Lawrencium |
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| – f block |
Berkelium Element Information
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| Origin of name | named after Berkeley, a city in California |
| Symbol | Bk |
| Atomic number (Z) | 97 |
| Atomic mass | (247) |
| Block | f-block |
| Period | 7 |
| Classification | Actinide |
| Atomic radius | 170 pm |
| Melting point | 986 ℃, 1807 ℉, 1259 K |
| Boiling point | 2627 ℃, 4760 ℉, 2900 K |
| Electron configuration | [Rn] 5f9 7s2 |
| Learn how to write: Berkelium Electron Configuration | |
| Electrons per shell | 2, 8, 18, 32, 27, 8, 2 |
| Crystal structure | Double hexagonal close-packed (dhcp) |
| Phase at r.t | Solid |
| Density near r.t | 14.78 g/cm3 |
| Natural occurrence | Synthetic |
| Oxidation state | +3 |
| Electronegativity (Pauling scale) | 1.3 |
| Protons Neutrons Electrons |
97 150 97 |
| CAS number | 7440-40-6 |
| Discovered at | Lawrence Berkeley National Laboratory in 1949 |
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Related:
More Elements:
External Links:
- https://en.wikipedia.org/wiki/Berkelium
- https://www.rsc.org/periodic-table/element/97/berkelium
- https://www.britannica.com/science/berkelium
- https://pubchem.ncbi.nlm.nih.gov/element/Berkelium
- https://www.chemicool.com/elements/berkelium.html
- https://www.livescience.com/40238-berkelium.html
- https://www.thoughtco.com/berkelium-element-facts-bk-3863126
