Roentgenium Element (Periodic Table)

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Roentgenium

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
 2
He
2
 3
Li
 4
Be
 5
B
 6
C
 7
N
 8
O
 9
F
 10
Ne
3
 11
Na
 12
Mg
 13
Al
 14
Si
 15
P
 16
S
 17
Cl
 18
Ar
4
 19
K
 20
Ca
 21
Sc
 22
Ti
 23
V
 24
Cr
 25
Mn
 26
Fe
 27
Co
 28
Ni
 29
Cu
 30
Zn
 31
Ga
 32
Ge
 33
As
 34
Se
 35
Br
 36
Kr
5
 37
Rb
 38
Sr
 39
Y
 40
Zr
 41
Nb
 42
Mo
 43
Tc
 44
Ru
 45
Rh
 46
Pd
 47
Ag
 48
Cd
 49
In
 50
Sn
 51
Sb
 52
Te
 53
I
 54
Xe
6
 55
Cs
 56
Ba
 72
Hf
 73
Ta
 74
W
 75
Re
 76
Os
 77
Ir
 78
Pt
 79
Au
 80
Hg
 81
Tl
 82
Pb
 83
Bi
 84
Po
 85
At
 86
Rn
7
 87
Fr
 88
Ra
 104
Rf
 105
Db
 106
Sg
 107
Bh
 108
Hs
 109
Mt
 110
Ds
 111
Rg
 112
Cn
 113
Nh
 114
Fl
 115
Mc
 116
Lv
 117
Ts
 118
Og
57
La
 58
Ce
 59
Pr
 60
Nd
 61
Pm
 62
Sm
 63
Eu
 64
Gd
 65
Tb
 66
Dy
 67
Ho
 68
Er
 69
Tm
 70
Yb
 71
Lu
89
Ac
 90
Th
 91
Pa
 92
U
 93
Np
 94
Pu
 95
Am
 96
Cm
 97
Bk
 98
Cf
 99
Es
 100
Fm
 101
Md
 102
No
 103
Lr
– d block

FAQs on Roentgenium Element

Roentgenium
‣ What does roentgenium look like?

Appearance: silvery (predicted)
‣ When was roentgenium discovered and by who?

Discovery: Gesellschaft für Schwerionenforschung (1994)
‣ Location of roentgenium on the periodic table

Roentgenium Periodic Table

Location: Roentgenium is found in the seventh row of the periodic table, next to the darmstadtium element.
‣ What is the atomic number of roentgenium?

Atomic number (Z): 111
‣ What is the symbol for roentgenium?

Symbol: Rg
‣ Roentgenium atomic weight: [282] (unconfirmed: 286)
‣ Roentgenium is which block element?

Block: d-block
‣ What group is roentgenium in the periodic table?

Group: 11
‣ What period is roentgenium on the periodic table?

Period: 7
‣ Roentgenium atomic radius: empirical: 138 pm (predicted)
‣ Roentgenium covalent radius: 121 pm (estimated)
‣ How many electrons does roentgenium have?

Electrons per shell: 2, 8, 18, 32, 32, 17, 2 (predicted)
‣ What is the electron configuration for roentgenium?

Electron configuration: [Rn] 5f14 6d9 7s2 (predicted)
‣ Roentgenium ionization energies:
1st: 1020 kJ/mol
2nd: 2070 kJ/mol
3rd: 3080 kJ/mol
(all estimated)
‣ Is roentgenium a solid, liquid or gas?

Phase (at r.t): solid (predicted)
‣ Roentgenium density (near r.t): 22-24 g/cm3 (predicted)
‣ Roentgenium natural occurrence: synthetic
‣ Roentgenium oxidation state: (-1), (+1), (+3), (+5), (+7) (predicted)
‣ What is the crystal structure of roentgenium?

Crystal structure: body-centered cubic (bcc) (predicted)
‣ Roentgenium CAS number: 54386-24-2

‣ How many isotopes does roentgenium have?

Main isotopes of roentgenium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
272Rgsyn2 msα268Mt
274Rgsyn12 msα272Mt
278Rgsyn4 msα274Mt
279Rgsyn0.09 sα275Mt
280Rgsyn4.6 sα276Mt
281Rgsyn17 sSF (90 %)
α (10 %)

277Mt
282Rgsyn100 sα278Mt
283Rgsyn5.1 min?SF
286Rgsyn10.7 min?α282Mt

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