Californium Element (Periodic Table)

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Californium

Californium (Cf) is a chemical element of the periodic table, located in the period 7, and has the atomic number 98. It is the tenth element in the actinide series. It is a soft, malleable, silvery-white metal which is named after the state of California, where it was first made. It is the sixth 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 Californium Element

Californium
‣ What does californium look like?

Appearance: silvery
‣ Who discovered californium and in what year?

Discovery: Lawrence Berkeley National Laboratory (1950)
‣ Where is californium on the periodic table?

Californium Periodic Table

Location: Californium is found in the seventh row of the periodic table, next to the berkelium element.
‣ Californium atomic number (Z): 98
‣ What is californium’s symbol?

Symbol: Cf
‣ Californium atomic weight: [251]
‣ What block does californium belong to?

Block: f-block
‣ What period is californium in the periodic table?

Period: 7
‣ Californium melting point: 1173 K (900 °C, 1652 °F)
‣ What is the boiling point of californium?

Boiling point: 1743 K (1470 °C, 2678 °F) (estimation)
‣ How many electron shells does californium have?

Electrons per shell: 2, 8, 18, 32, 28, 8, 2
‣ What is the electron configuration of californium?

Electron configuration: [Rn] 5f10 7s2
‣ Californium ionization energies:
1st: 608 kJ/mol
‣ What is the phase of californium?

Phase (at r.t): solid
‣ Californium density (near r.t): 15.1 g/cm3
‣ Californium natural occurrence: synthetic
‣ Californium oxidation state: +3
‣ What’s the electronegativity of californium?

Electronegativity: Pauling scale: 1.3
‣ What is the structure of californium?

Crystal structure: double hexagonal close-packed (dhcp)
‣ Californium hardness

Mohs hardness: 3-4
‣ Californium CAS number: 7440-71-3

‣ How many isotopes does californium have?

Main isotopes of californium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
248Cfsyn333.5 dα (100 %)
SF (2.9 × 10-3 %)		244Cm
–
249Cfsyn351 dα (100 %)
SF (5.0 × 10-7 %)		245Cm
–
250Cfsyn13.08 yα (99.92 %)
SF (0.08 %)		246Cm
–
251Cfsyn898 yα247Cm
252Cfsyn2.645 yα (96.91 %)
SF (3.09 %)		248Cm
–
253Cfsyn17.81 dβ– (99.69 %)
α (0.31 %)		253Es
249Cm
254Cfsyn60.5 dSF (99.69 %)
α (0.31 %)		–
250Cm

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