Nickel has two isotopes Ni⁵⁹&Ni⁵⁸ and average atomic weight of Ni is 58.7 then %abundance of Ni⁵⁸ is
Answers
Answer:
Naturally, occurring nickel (28Ni) is composed of five stable isotopes; 58
Ni
, 60
Ni
, 61
Ni
, 62
Ni
and 64
Ni
, with 58
Ni
being the most abundant (68.077% natural abundance).[3] 26 radioisotopes have been characterized with the most stable being 59
Ni
with a half-life of 76,000 years, 63
Ni
with a half-life of 100.1 years, and 56
Ni
with a half-life of 6.077 days. All of the remaining radioactive isotopes have half-lives that are less than 60 hours and the majority of these have half-lives that are less than 30 seconds. This element also has 8 meta states.
List of isotopes
Nuclide
[n 1] Z N Isotopic mass (Da)
[n 2][n 3] Half-life
[n 4] Decay
mode
[n 5] Daughter
isotope
[n 6] Spin and
parity
[n 7][n 4] Natural abundance (mole fraction)
Excitation energy Normal proportion Range of variation
48
Ni
28 20 48.01975(54)# 10# ms
[>500 ns] 0+
49
Ni
28 21 49.00966(43)# 13(4) ms
[12(+5−3) ms] 7/2−#
50
Ni
28 22 49.99593(28)# 9.1(18) ms β+ 50Co 0+
51
Ni
28 23 50.98772(28)# 30# ms
[>200 ns] β+ 51Co 7/2−#
52
Ni
28 24 51.97568(9)# 38(5) ms β+ (83%) 52Co 0+
β+, p (17%) 51Fe
53
Ni
28 25 52.96847(17)# 45(15) ms β+ (55%) 53Co (7/2−)#
β+, p (45%) 52Fe
54
Ni
28 26 53.95791(5) 104(7) ms β+ 54Co 0+
55
Ni
28 27 54.951330(12) 204.7(17) ms β+ 55Co 7/2−
56
Ni
28 28 55.942132(12) 6.075(10) d β+ 56
Co
0+
57
Ni
28 29 56.9397935(19) 35.60(6) h β+ 57
Co
3/2−
58
Ni
28 30 57.9353429(7) Observationally stable[n 8] 0+ 0.680769(89)
59
Ni
28 31 58.9343467(7) 7.6(5)×104 y EC (99%) 59
Co
3/2−
β+ (1.5×10−5%)[4]
60
Ni
28 32 59.9307864(7) Stable 0+ 0.262231(77)
61
Ni
28 33 60.9310560(7) Stable 3/2− 0.011399(6)
62
Ni
[n 9] 28 34 61.9283451(6) Stable 0+ 0.036345(17)
63
Ni
28 35 62.9296694(6) 100.1(20) y β− 63
Cu
1/2−
63m
Ni
87.15(11) keV 1.67(3) μs 5/2−
64
Ni
28 36 63.9279660(7) Stable 0+ 0.009256(9)
65
Ni
28 37 64.9300843(7) 2.5172(3) h β− 65
Cu
5/2−
65m
Ni
63.37(5) keV 69(3) μs 1/2−
66
Ni
28 38 65.9291393(15) 54.6(3) h β− 66
Cu
0+
67
Ni
28 39 66.931569(3) 21(1) s β− 67
Cu
1/2−
67m
Ni
1007(3) keV 13.3(2) μs β− 67
Cu
9/2+
IT 67Ni
68
Ni
28 40 67.931869(3) 29(2) s β− 68
Cu
0+
68m1
Ni
1770.0(10) keV 276(65) ns 0+
68m2
Ni
2849.1(3) keV 860(50) μs 5−
69
Ni
28 41 68.935610(4) 11.5(3) s β− 69
Cu
9/2+
69m1
Ni
321(2) keV 3.5(4) s β− 69
Cu
(1/2−)
IT 69Ni
69m2
Ni
2701(10) keV 439(3) ns (17/2−)
70
Ni
28 42 69.93650(37) 6.0(3) s β− 70
Cu
0+
70m
Ni
2860(2) keV 232(1) ns 8+
71
Ni
28 43 70.94074(40) 2.56(3) s β− 71
Cu
1/2−#
72
Ni
28 44 71.94209(47) 1.57(5) s β− (>99.9%) 72
Cu
0+
β−, n (<.1%) 71
Cu
73
Ni
28 45 72.94647(32)# 0.84(3) s β− (>99.9%) 73
Cu
(9/2+)
β−, n (<.1%) 72
Cu
74
Ni
28 46 73.94807(43)# 0.68(18) s β− (>99.9%) 74
Cu
0+
β−, n (<.1%) 73
Cu
75
Ni
28 47 74.95287(43)# 0.6(2) s β− (98.4%) 75
Cu
(7/2+)#
β−, n (1.6%) 74
Cu
76
Ni
28 48 75.95533(97)# 470(390) ms
[0.24(+55−24) s] β− (>99.9%) 76
Cu
0+
β−, n (<.1%) 75
Cu
77
Ni
28 49 76.96055(54)# 300# ms
[>300 ns] β− 77
Cu
9/2+#
78
Ni
28 50 77.96318(118)# 120# ms
[>300 ns] β− 78
Cu
0+
79
Ni
28 51 78.970400(640)# 43.0 ms +86−75 β− 79
Cu
80
Ni
28 52 78.970400(640)# 24 ms +26−17 β− 80
Cu
This table header & footer: view
mNi – Excited nuclear isomer.
( ) – Uncertainty (1σ) is given in the concise form in parentheses after the corresponding last digits.
# – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
# – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
Modes of decay:
EC: Electron capture
IT: Isomeric transition
n: Neutron emission
Bold symbol as a daughter – Daughter product is stable.
( ) spin value – Indicates spin with weak assignment arguments.
Believed to decay by β+β+ to 58Fe with a half-life over 7×1020 years
Highest binding energy per nucleon of all nuclides
Notable isotopes
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The 5 stable and 30 unstable isotopes of nickel range in atomic weight from 48
Ni
to 82
Ni
, and include:[5]
Nickel-48, discovered in 1999, is the most neutron-poor nickel isotope known. With 28 protons and 20 neutrons 48
Ni
is "doubly magic" (like 208
Pb,
Explanation: