Curium Element (Periodic Table)

Curium

Curium (Cm) is a chemical element of the periodic table, located in the period 7, and has the atomic number 96. It is the eighth element in the actinide series. It is a hard, silvery-white metal which is named in honour of Marie and Pierre Curie. It is the fourth 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 Curium Element

Curium
‣ What does curium look like?

Appearance: silvery metallic, glows purple in the dark
‣ Who discovered curium and in what year?

Discovery: Glenn T. Seaborg, Ralph A. James, Albert Ghiorso (1944)
‣ Where is curium found on the periodic table?

Curium Periodic Table

Location: Curium is found in the seventh row of the periodic table, next to the americium element.
‣ What is the atomic number of curium?

Atomic number (Z): 96
‣ What is the symbol of curium?

Symbol: Cm
Curium atomic weight: [247]
‣ What block does curium belong to?

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

Period: 7
Curium atomic radius: empirical: 174 pm
Curium covalent radius: 169±3 pm
Curium melting point: 1613 K (1340 °C, 2444 °F)
‣ What is curium boiling point?

Boiling point: 3383 K (3110 °C, 5630 °F)
‣ How many electron shells does curium have?

Electrons per shell: 2, 8, 18, 32, 25, 9, 2
‣ What is the electron configuration of curium?

Electron configuration: [Rn] 5f7 6d1 7s2
Curium ionization energies:
1st: 581 kJ/mol
‣ What is the phase of curium?

Phase (at r.t): solid
‣ What is the density of the element curium?

Density (near r.t): 13.51 g/cm3
Curium magnetic ordering: antiferromagnetic-paramagnetic transition at 52 K
Curium natural occurrence: synthetic
Curium oxidation state: +3
‣ What’s the electronegativity of curium?

Electronegativity: Pauling scale: 1.3
Curium heat of fusion: 13.85 kJ/mol
Curium crystal structure: double hexagonal close-packed (dhcp)
Curium electrical resistivity: 1.25 µΩ.m
Curium CAS number: 7440-51-9

‣ Curium vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)17881982

‣ How many isotopes does curium have?

Main isotopes of curium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
242Cmsyn160 dSF
α

238Pu
243Cmsyn29.1 yα
ε
SF
239Pu
243Am
244Cmsyn18.1 ySF
α

240Pu
245Cmsyn8500 ySF
α

241Pu
246Cmsyn4730 yα
SF
242Pu
247Cmsyn1.56 × 107 yα243Pu
248Cmsyn3.40 × 105 yα
SF
244Pu
250Cmsyn9000 ySF
α
β

246Pu
250Bk

.
.
.

Related:

Also Read:

Leave a Comment