Neptunium

93 uranium ← neptunium → plutonium Pm ↑ Np ↓ (Uqt) Tabel périodik
Katrangan Umum Unsur
Jeneng, Lambang, Nomer atom	neptunium, Np, 93
Dhèrèt kimia	aktinida
Golongan, Periode, Blok	n/a, 7, f
Rupa	silvery metallic
Massa atom	(237) g/mol
Konfigurasi elektron	[Rn] 5f4 6d1 7s2
Cacahing èlèktron saben kulit	2, 8, 18, 32, 22, 9, 2
Ciri-ciri fisik
Fase	solid
Massa jenis (watara suhu kamar)	20.45 g/cm³
Titik lebur	910 K (637 °C, 1179 °F)
Titik umob	4273 K (4000 °C, 7232 °F)
Kalor peleburan	3.20 kJ/mol
Kalor panguapan	336 kJ/mol
Kapasitas kalor	(25 °C) 29.46 J/(mol·K)
Tekanan uap P/Pa 1 10 100 1 k 10 k 100 k ing T/K 2194 2437
Ciri-ciri atom
Struktur kristal	3 forms: orthorhombic, tetragonal and cubic
Bilangan oksidasi	6, 5, 4, 3 (amphoteric oxide)
Elektronegativitas	1.36 (skala Pauling)
Energi ionisasi	pertama: 604.5 kJ/mol
Jari-jari atom	175 pm
Lain-lain
Sifat magnetik	?
Resistivitas elektris	(22 °C) 1.220 µΩ·m
Konduktivitas termal	(300 K) 6.3 W/(m·K)
Nomor CAS	7439-99-8
Isotop
iso NA waktu paruh DM DE (MeV) DP 235Np syn 396.1 d α 5.192 231Pa ε 0.124 235U 236Np syn 1.54×105 y ε 0.940 236U β- 0.940 236Pu α 5.020 232Pa 237Np syn 2.144×106 y SF & α 4.959 233Pa
Referensi

Neptunium (uniné /nɛpˈtjuːniəm/) iku unsur kimia kanthi simbul Np lan nomer atom 93.

Rujukan

• Los Alamos National Laboratory's Chemistry Division: Periodic Table - Neptunium Archived 2006-10-12 at the Wayback Machine.
• Guide to the Elements - Revised Edition, Albert Stwertka, (Oxford University Press; 1998) ISBN 0-19-508083-1

Pranala njaba

Wiktionary

Pirsani informasi ngenani Neptunium ing KamusWiki.

• WebElements.com - Neptunium (also used as a reference)
• Lab builds world's first neptunium sphere Archived 2006-09-25 at the Wayback Machine., U.S. Department of Energy Research News
• NLM Hazardous Substances Databank – Neptunium, Radioactive

Golongan →

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

Période ↓

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

*

71 Lu

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

**

103 Lr

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

* Lantanida

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

** Aktinida

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

Seri Kimia saka Tabel Périodik

Logam alkali	Alkali tanah	Lantanida	Aktinida	Logam transisi
Logam	Metaloid	Nonlogam	Halogen	Gas mulia