Am Americium – Element Information, Facts, Properties, Trends,Uses, Comparison with other elements

95
Am
Americium

Americium

Element 95 of Periodic table is Americium with atomic number 95, atomic weight 243. Americium, symbol Am, has a Simple Hexagonal structure and Silver color. Americium is a actinide element. Know everything about Americium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure.

95 Am - Americium | SchoolMyKids

Americium is a radioactive transuranic chemical element with symbol Am and atomic number 95. This member of the actinide series is located in the periodic table under the lanthanide element europium, and thus by analogy was named after the Americas. Americium was first produced in 1944 by the group of Glenn T.Seaborg from Berkeley, California, at the metallurgical laboratory of University of Chicago.

How to Locate Americium 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 95 to find Americium 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 Americium on periodic table look for cross section of group N/A and period 7 in the modern periodic table.

Table of Contents

Americium History

The element Americium was discovered by Glenn T. Seaborg in year 1944 in United States . Americium derived its name from The Americas, as the element was first synthesized on the continent, by analogy with europium

Americium Presence: Abundance in Nature and Around Us

The table below shows the abundance of Americium 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 Americium

The solid state structure of Americium 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
346.81 346.81 1124.1 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 95 Am Americium - Crystal Structure | SchoolMyKids
Space Group Number 194
Crystal Structure Simple Hexagonal

Americium Atomic and Orbital Properties

Americium atoms have 95 electrons and the electronic shell structure is [2, 8, 18, 32, 25, 8, 2] with Atomic Term Symbol (Quantum Numbers) 8S7/2.

Atomic Number 95
Number of Electrons (with no charge) 95
Number of Protons 95
Mass Number 243
Number of Neutrons 148
Shell structure (Electrons per energy level) [2, 8, 18, 32, 25, 8, 2]
Electron Configuration [Rn] 5f7 7s2
Valence Electrons 5f7 7s2
Oxidation State 2;3;4;5;6;7
Atomic Term Symbol (Quantum Numbers) 8S7/2

Shell Structure of Americium - Electrons per energy level

95 Am Americium - 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 7
6 P 2 6
7 Q 2

Ground State Electronic Configuration of Americium - neutral Americium atom

The ground state electronic configuration of Neutral Americium atom is [Rn] 5f7 7s2. The portion of Americium 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 5f7 7s2, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Americium

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

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f7 7s2

Atomic Structure of Americium

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

Atomic Radius

175 pm (1.75 Å)

Atomic Volume 17.776152158 cm3
Covalent Radius N/A
Van der Waals Radius N/A
Neutron Cross Section 74 σa/barns

Atomic Spectrum of Americium

Atomic Spectrum of Americium | SchoolMyKids

Americium Chemical Properties: Americium Ionization Energies and electron affinity

The electron affinity of Americium is N/A

Valence 4
Electronegativity 1.3
ElectronAffinity N/A

Ionization Energy of Americium

Refer to table below for Ionization energies of Americium

Ionization energy number Enthalpy - kJ/mol
1 578

Americium Physical Properties

Refer to below table for Americium Physical Properties

Density 13.67 g/cm3
Molar Volume 17.776152158 cm3

Elastic Properties

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

Hardness of Americium - Tests to Measure of Hardness of Element

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

Americium Electrical Properties

Americium is N/A of electricity. Refer to table below for the Electrical properties of Americium

Electrical Conductivity N/A
Resistivity N/A
Superconducting Point 0.6

Americium Heat and Conduction Properties

Thermal Conductivity 10 W/(m K)
Thermal Expansion N/A

Americium Magnetic Properties

Magnetic Type Paramagnetic
Curie Point N/A
Mass Magnetic Susceptibility 5.15×10-8
Molar Magnetic Susceptibility 1.251×10-8
Volume Magnetic Susceptibility 0.000704

Optical Properties of Americium

Refractive Index N/A

Acoustic Properties of Americium

Speed of Sound N/A

Americium Thermal Properties - Enthalpies and thermodynamics

Refer to table below for Thermal properties of Americium

Melting Point 1449 K (1176 °C)
Boiling Point 2284 K (2011 °C)
Critical Temperature N/A
Superconducting Point 0.6

Enthalpies of Americium

Heat of Fusion N/A
Heat of Vaporization N/A
Heat of Combustion N/A

Americium Isotopes - Nuclear Properties of Americium

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

Isotope Isotope Mass % Abundance T half Decay Mode
231Am  
232Am  
233Am  
234Am  
235Am  
236Am  
237Am  
238Am  
239Am  
240Am  
241Am  
242Am  
243Am  
244Am  
245Am  
246Am  
247Am  
248Am  
249Am  

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS Number CAS7440-35-9
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) CAS7440-35-9
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