Ho Holmium – Element Information, Facts, Properties, Trends,Uses, Comparison with other elements

67
Ho
Holmium

Holmium

Element 67 of Periodic table is Holmium with atomic number 67, atomic weight 164.93032. Holmium, symbol Ho, has a Simple Hexagonal structure and Silver color. Holmium is a lanthanide element. Know everything about Holmium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure.

67 Ho - Holmium | SchoolMyKids

Holmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare earth element. Holmium was discovered by Swedish chemist Per Theodor Cleve.

How to Locate Holmium 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 67 to find Holmium 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 Holmium on periodic table look for cross section of group N/A and period 6 in the modern periodic table.

Table of Contents

Holmium History

The element Holmium was discovered by Marc Delafontaine in year 1878 in Switzerland . Holmium derived its name from Holmia, the New Latin name for Stockholm

Holmium Presence: Abundance in Nature and Around Us

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

  Ppb by weight (1ppb =10^-7 %)
Abundance in Universe 5×10-8%
Abundance in Sun None
Abundance in Meteorites 5.9×10-6%
Abundance in Earth's Crust 1.2e-06
Abundance in Oceans 2.2×10-11%
Abundance in Humans N/A

Crystal Structure of Holmium

The solid state structure of Holmium is Simple Hexagonal.

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
357.73 357.73 561.58 pm

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

alpha beta gamma
π/2 π/2 2 π/3

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 P63/mmc 67 Ho Holmium - Crystal Structure | SchoolMyKids
Space Group Number 194
Crystal Structure Simple Hexagonal

Holmium Atomic and Orbital Properties

Holmium atoms have 67 electrons and the electronic shell structure is [2, 8, 18, 29, 8, 2] with Atomic Term Symbol (Quantum Numbers) 4I15/2.

Atomic Number 67
Number of Electrons (with no charge) 67
Number of Protons 67
Mass Number 165
Number of Neutrons 98
Shell structure (Electrons per energy level) [2, 8, 18, 29, 8, 2]
Electron Configuration [Xe] 4f11 6s2
Valence Electrons 4f11 6s2
Oxidation State 2;3
Atomic Term Symbol (Quantum Numbers) 4I15/2

Shell Structure of Holmium - Electrons per energy level

67 Ho Holmium - 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 11
5 O 2 6
6 P 2

Ground State Electronic Configuration of Holmium - neutral Holmium atom

The ground state electronic configuration of Neutral Holmium atom is [Xe] 4f11 6s2. The portion of Holmium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Xe]. 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 4f11 6s2, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Holmium

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

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f11 6s2

Atomic Structure of Holmium

Holmium atomic radius is 226 pm, while it's covalent radius is N/A.

Atomic Radius

226 pm (2.26 Å)

Atomic Volume 18.7527367823 cm3
Covalent Radius N/A
Van der Waals Radius N/A
Neutron Cross Section 65 σa/barns

Atomic Spectrum of Holmium

Atomic Spectrum of Holmium | SchoolMyKids

Holmium Chemical Properties: Holmium Ionization Energies and electron affinity

The electron affinity of Holmium is 50 kJ/mol

Valence 3
Electronegativity 1.23
ElectronAffinity 50 kJ/mol

Ionization Energy of Holmium

Refer to table below for Ionization energies of Holmium

Ionization energy number Enthalpy - kJ/mol
1 581
2 1140
3 2204
4 4.1×103

Holmium Physical Properties

Refer to below table for Holmium Physical Properties

Density 8.795 g/cm3
Molar Volume 18.7527367823 cm3

Elastic Properties

Young Modulus 65 GPa
Shear Modulus 26 GPa
Bulk Modulus 40 GPa
Poisson Ratio 0.23

Hardness of Holmium - Tests to Measure of Hardness of Element

Mohs Hardness N/A
Vickers Hardness 481 MPa
Brinell Hardness 746 MPa

Holmium Electrical Properties

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

Electrical Conductivity 1.1×106 S/m
Resistivity 9.4×10-7 m Ω
Superconducting Point N/A

Holmium Heat and Conduction Properties

Thermal Conductivity 16 W/(m K)
Thermal Expansion 0.0000112 K-1

Holmium Magnetic Properties

Magnetic Type Paramagnetic
Curie Point 20 K
Mass Magnetic Susceptibility 5.49×10-6
Molar Magnetic Susceptibility 9.05467×10-7
Volume Magnetic Susceptibility 0.0482845

Optical Properties of Holmium

Refractive Index N/A

Acoustic Properties of Holmium

Speed of Sound 2760 m/s

Holmium Thermal Properties - Enthalpies and thermodynamics

Refer to table below for Thermal properties of Holmium

Melting Point 1747 K (1474 °C)
Boiling Point 2973 K (2700 °C)
Critical Temperature N/A
Superconducting Point N/A

Enthalpies of Holmium

Heat of Fusion 17 kJ/mol
Heat of Vaporization 265 kJ/mol
Heat of Combustion N/A

Holmium Isotopes - Nuclear Properties of Holmium

Isotopes of rhodium. Naturally occurring Holmium has 1 stable isotope - 165Ho.

Isotope Isotope Mass % Abundance T half Decay Mode
140Ho  
141Ho  
142Ho  
143Ho  
144Ho  
145Ho  
146Ho  
147Ho  
148Ho  
149Ho  
150Ho  
151Ho  
152Ho  
153Ho  
154Ho  
155Ho  
156Ho  
157Ho  
158Ho  
159Ho  
160Ho  
161Ho  
162Ho  
163Ho  
164Ho  
165Ho   100% Stable N/A
166Ho  
167Ho  
168Ho  
169Ho  
170Ho  
171Ho  
172Ho  
173Ho  
174Ho  
175Ho  

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS Number CAS7440-60-0
RTECS Number N/A
DOT Hazard Class 4.1
DOT Numbers 3089
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) CAS7440-60-0
CID Number CID23988
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