Np Neptunium – Element Information, Facts, Properties, Trends,Uses, Comparison with other elements

93
Np
Neptunium

Neptunium

Element 93 of Periodic table is Neptunium with atomic number 93, atomic weight 237. Neptunium, symbol Np, has a Simple Orthorhombic structure and Silver color. Neptunium is a actinide element. Know everything about Neptunium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure.

93 Np - Neptunium | SchoolMyKids

Neptunium is a chemical element with symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element. Its position in the periodic table just after uranium, named after the planet Uranus, led to it being named after Neptune, the next planet beyond Uranus.

How to Locate Neptunium on Periodic Table

Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of electrons. The atomic number increases from left to right. Periodic table starts at top left ( Atomic number 1) and ends at bottom right (atomic number 118). Therefore you can directly look for atomic number 93 to find Neptunium on periodic table.

Another way to read periodic table and locate an element is by using group number (column) and period number (row). To locate Neptunium on periodic table look for cross section of group N/A and period 7 in the modern periodic table.

Table of Contents

Neptunium History

The element Neptunium was discovered by Edwin McMillan in year 1940 in United States . Neptunium derived its name from Neptune, the eighth planet in the Solar System

Neptunium Presence: Abundance in Nature and Around Us

The table below shows the abundance of Neptunium in Universe, Sun, Meteorites, Earth's Crust, Oceans and Human Body.

  Ppb by weight (1ppb =10^-7 %)
Abundance in Universe N/A
Abundance in Sun None
Abundance in Meteorites None
Abundance in Earth's Crust None
Abundance in Oceans None
Abundance in Humans None

Crystal Structure of Neptunium

The solid state structure of Neptunium is Simple Orthorhombic.

The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in three dimensional space to form the structure.

Unit Cell Parameters

The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell edges Lattice Constants (a, b and c)

a b c
666.3 472.3 488.7 pm

and the angles between them Lattice Angles (alpha, beta and gamma).

alpha beta gamma
π/2 π/2 π/2

The positions of the atoms inside the unit cell are described by the set of atomic positions ( xi, yi, zi) measured from a reference lattice point.

The symmetry properties of the crystal are described by the concept of space groups. All possible symmetric arrangements of particles in three-dimensional space are described by the 230 space groups (219 distinct types, or 230 if chiral copies are considered distinct.

Space Group Name Pnma 93 Np Neptunium - Crystal Structure | SchoolMyKids
Space Group Number 62
Crystal Structure Simple Orthorhombic

Neptunium Atomic and Orbital Properties

Neptunium atoms have 93 electrons and the electronic shell structure is [2, 8, 18, 32, 22, 9, 2] with Atomic Term Symbol (Quantum Numbers) 6L11/2.

Atomic Number 93
Number of Electrons (with no charge) 93
Number of Protons 93
Mass Number 237
Number of Neutrons 144
Shell structure (Electrons per energy level) [2, 8, 18, 32, 22, 9, 2]
Electron Configuration [Rn] 5f4 6d1 7s2
Valence Electrons 5f4 6d1 7s2
Oxidation State 2;3;4;5;6;7
Atomic Term Symbol (Quantum Numbers) 6L11/2

Shell Structure of Neptunium - Electrons per energy level

93 Np Neptunium - Electron Shell Structure | SchoolMyKids
n s p d f
1 K 2
2 L 2 6
3 M 2 6 10
4 N 2 6 10 14
5 O 2 6 10 4
6 P 2 6 1
7 Q 2

Ground State Electronic Configuration of Neptunium - neutral Neptunium atom

The ground state electronic configuration of Neutral Neptunium atom is [Rn] 5f4 6d1 7s2. The portion of Neptunium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Rn]. For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used.This is important as it is the Valence electrons 5f4 6d1 7s2, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Neptunium

Complete ground state electronic configuration for the Neptunium atom, Unabbreviated electronic configuration

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f4 6d1 7s2

Atomic Structure of Neptunium

Neptunium atomic radius is 175 pm, while it's covalent radius is N/A.

Atomic Radius

175 pm (1.75 Å)

Atomic Volume 11.5892420538 cm3
Covalent Radius N/A
Van der Waals Radius N/A
Neutron Cross Section 180 σa/barns

Atomic Spectrum of Neptunium

Atomic Spectrum of Neptunium | SchoolMyKids

Neptunium Chemical Properties: Neptunium Ionization Energies and electron affinity

The electron affinity of Neptunium is N/A

Valence 6
Electronegativity 1.36
ElectronAffinity N/A

Ionization Energy of Neptunium

Refer to table below for Ionization energies of Neptunium

Ionization energy number Enthalpy - kJ/mol
1 604.5

Neptunium Physical Properties

Refer to below table for Neptunium Physical Properties

Density 20.45 g/cm3
Molar Volume 11.5892420538 cm3

Elastic Properties

Young Modulus N/A
Shear Modulus N/A
Bulk Modulus N/A
Poisson Ratio N/A

Hardness of Neptunium - Tests to Measure of Hardness of Element

Mohs Hardness N/A
Vickers Hardness N/A
Brinell Hardness N/A

Neptunium Electrical Properties

Neptunium is Conductor of electricity. Refer to table below for the Electrical properties of Neptunium

Electrical Conductivity 8.3×105 S/m
Resistivity 1.2×10-6 m Ω
Superconducting Point N/A

Neptunium Heat and Conduction Properties

Thermal Conductivity 6 W/(m K)
Thermal Expansion N/A

Neptunium Magnetic Properties

Magnetic Type N/A
Curie Point N/A
Mass Magnetic Susceptibility N/A
Molar Magnetic Susceptibility N/A
Volume Magnetic Susceptibility N/A

Optical Properties of Neptunium

Refractive Index N/A

Acoustic Properties of Neptunium

Speed of Sound N/A

Neptunium Thermal Properties - Enthalpies and thermodynamics

Refer to table below for Thermal properties of Neptunium

Melting Point 917 K (644 °C)
Boiling Point 4273 K (4×103 °C)
Critical Temperature N/A
Superconducting Point N/A

Enthalpies of Neptunium

Heat of Fusion 10 kJ/mol
Heat of Vaporization 335 kJ/mol
Heat of Combustion N/A

Neptunium Isotopes - Nuclear Properties of Neptunium

Isotopes of rhodium. Naturally occurring Neptunium has 1 stable isotope - None.

Isotope Isotope Mass % Abundance T half Decay Mode
225Np  
226Np  
227Np  
228Np  
229Np  
230Np  
231Np  
232Np  
233Np  
234Np  
235Np  
236Np  
237Np  
238Np  
239Np  
240Np  
241Np  
242Np  
243Np  
244Np  

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS Number CAS7439-99-8
RTECS Number N/A
DOT Hazard Class N/A
DOT Numbers N/A
EU Number N/A
NFPA Fire Rating N/A
NFPA Hazards N/A
NFPA Health Rating N/A
NFPA Reactivity Rating N/A
Autoignition Point N/A
Flashpoint N/A

Database Search

List of unique identifiers to search the element in various chemical registry databases

Database Identifier number
CAS Number - Chemical Abstracts Service (CAS) CAS7439-99-8
CID Number N/A
Gmelin Number N/A
NSC Number N/A
RTECS Number N/A

List of Elements
1 H - Hydrogen
2 He - Helium
3 Li - Lithium
4 Be - Beryllium
5 B - Boron
6 C - Carbon
7 N - Nitrogen
8 O - Oxygen
9 F - Fluorine
10 Ne - Neon
11 Na - Sodium
12 Mg - Magnesium
13 Al - Aluminium
14 Si - Silicon
15 P - Phosphorus
16 S - Sulfur
17 Cl - Chlorine
18 Ar - Argon
19 K - Potassium
20 Ca - Calcium
21 Sc - Scandium
22 Ti - Titanium
23 V - Vanadium
24 Cr - Chromium
25 Mn - Manganese
26 Fe - Iron
27 Co - Cobalt
28 Ni - Nickel
29 Cu - Copper
30 Zn - Zinc
31 Ga - Gallium
32 Ge - Germanium
33 As - Arsenic
34 Se - Selenium
35 Br - Bromine
36 Kr - Krypton
37 Rb - Rubidium
38 Sr - Strontium
39 Y - Yttrium
40 Zr - Zirconium
41 Nb - Niobium
42 Mo - Molybdenum
43 Tc - Technetium
44 Ru - Ruthenium
45 Rh - Rhodium
46 Pd - Palladium
47 Ag - Silver
48 Cd - Cadmium
49 In - Indium
50 Sn - Tin
51 Sb - Antimony
52 Te - Tellurium
53 I - Iodine
54 Xe - Xenon
55 Cs - Cesium
56 Ba - Barium
57 La - Lanthanum
58 Ce - Cerium
59 Pr - Praseodymium
60 Nd - Neodymium
61 Pm - Promethium
62 Sm - Samarium
63 Eu - Europium
64 Gd - Gadolinium
65 Tb - Terbium
66 Dy - Dysprosium
67 Ho - Holmium
68 Er - Erbium
69 Tm - Thulium
70 Yb - Ytterbium
71 Lu - Lutetium
72 Hf - Hafnium
73 Ta - Tantalum
74 W - Tungsten
75 Re - Rhenium
76 Os - Osmium
77 Ir - Iridium
78 Pt - Platinum
79 Au - Gold
80 Hg - Mercury
81 Tl - Thallium
82 Pb - Lead
83 Bi - Bismuth
84 Po - Polonium
85 At - Astatine
86 Rn - Radon
87 Fr - Francium
88 Ra - Radium
89 Ac - Actinium
90 Th - Thorium
91 Pa - Protactinium
92 U - Uranium
93 Np - Neptunium
94 Pu - Plutonium
95 Am - Americium
96 Cm - Curium
97 Bk - Berkelium
98 Cf - Californium
99 Es - Einsteinium
100 Fm - Fermium
101 Md - Mendelevium
102 No - Nobelium
103 Lr - Lawrencium
104 Rf - Rutherfordium
105 Db - Dubnium
106 Sg - Seaborgium
107 Bh - Bohrium
108 Hs - Hassium
109 Mt - Meitnerium
110 Ds - Darmstadtium
111 Rg - Roentgenium
112 Cn - Copernicium
113 Nh - Nihonium
114 Fl - Flerovium
115 Mc - Moscovium
116 Lv - Livermorium
117 Ts - Tennessine
118 Og - Oganesson
Metalloid
Nonmetals
Other Nonmetals
Halogens Noble Gas
Metals
Alkali Metals Alkaline Earth Metals
Transition Metals Post-Transition Metals
Lanthanide Actinide