Roentgenium (Rg) is a chemical element of the periodic table, located in the group 11 and the period 7, and has the atomic number 111. It is named after the German mechanical engineer, Wilhelm Röntgen, the discoverer of X-rays. It is a 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 |
|
| 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 |
||
| 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 |
|||||
| 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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| – d block |
Roentgenium Element Information
 |
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| Origin of name | named after German mechanical engineer, Wilhelm Röntgen |
| Symbol | Rg |
| Atomic number (Z) | 111 |
| Atomic mass | (282) |
| Block | d-block |
| Group | 11 |
| Period | 7 |
| Classification | Unknown chemical properties |
| Atomic radius | 138 pm (predicted) |
| Covalent radius | 121 pm (estimated) |
| Electron configuration | [Rn] 5f14 6d9 7s2 (predicted) |
| Electrons per shell | 2, 8, 18, 32, 32, 17, 2 (predicted) |
| Crystal structure | Body-centered cubic (bcc) (predicted) |
| Phase at r.t | Solid (predicted) |
| Density near r.t | 22-24 g/cm3 (predicted) |
| Natural occurrence | Synthetic |
| Oxidation state | +3 (predicted) |
| Protons Neutrons Electrons |
111 171 111 |
| CAS number | 54386-24-2 |
| Discovered by | Gesellschaft für Schwerionenforschung in 1994 |
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Related:
More Elements:
External Links:
- https://www.rsc.org/periodic-table/element/111/roentgenium
- https://en.wikipedia.org/wiki/Roentgenium
- https://pubchem.ncbi.nlm.nih.gov/element/Roentgenium
- https://www.britannica.com/science/roentgenium
- https://www.chemicool.com/elements/roentgenium.html
- https://www.livescience.com/41347-facts-about-roentgenium.html
- https://www.thoughtco.com/roentgenium-facts-rg-or-element-111-3876744
- https://education.jlab.org/itselemental/ele111.html
