Californium Element (Periodic Table)

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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