Einsteinium Element (Periodic Table)

Einsteinium

Einsteinium (En) is a chemical element of the periodic table, located in the period 7, and has the atomic number 99. It is the eleventh element in the actinide series. It is a soft, silvery metal that glows in the dark with a blue light. It is named after the German-born theoretical physicist Albert Einstein. It is the seventh 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
– f block

FAQs on Einsteinium Element

Einsteinium
‣ What does einsteinium look like?

Appearance: silvery; glows blue in the dark
‣ Who discovered einsteinium and in what year?

Discovery: Lawrence Berkeley National Laboratory (1952)
‣ Where is einsteinium on the periodic table?

Einsteinium Periodic Table

Location: Einsteinium is found in the seventh row of the periodic table, next to the californium element.
‣ What is the atomic number of einsteinium?

Atomic number (Z): 99
Einsteinium symbol: Es
‣ What is the atomic weight of einsteinium?

Standard atomic weight: [252]
‣ What block is einsteinium in the periodic table?

Block: f-block
‣ What period is einsteinium on the periodic table?

Period: 7
‣ What is einsteinium melting point?

Melting point: 1133 K (860 °C, 1580 °F)
‣ What is the boiling point of einsteinium?

Boiling point: 1269 K (996 °C, 1825 °F) (estimated)
‣ How many electrons are there in einsteinium?

Electrons per shell: 2, 8, 18, 32, 29, 8, 2
‣ What is the electron configuration of einsteinium?

Electron configuration: [Rn] 5f11 7s2
Einsteinium ionization energies:
1st: 619 kJ/mol
‣ Is einsteinium a solid, liquid or gas?

Phase (at r.t): solid
Einsteinium density (near r.t): 8.84 g/cm3
Einsteinium magnetic ordering: paramagnetic
Einsteinium natural occurrence: synthetic
Einsteinium oxidation state: +3
Einsteinium electronegativity: Pauling scale: 1.3
‣ What is the crystal structure of einsteinium?

Crystal structure: face-centered cubic (fcc)
Einsteinium CAS number: 7429-92-7

‣ How many isotopes of einsteinium are there?

Main isotopes of einsteinium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
252Essyn471.7 dα
ε
β
248Bk
252Cf
252Fm
253Essyn20.47 dSF
α

249Bk
254Essyn275.7 yε
β
α
254Cf
254Fm
250Bk
255Essyn39.8 dβ
α
SF
255Fm
251Bk

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