Sr Strontium – Element Information, Facts, Properties, Trends,Uses, Comparison with other elements

38
Sr
Strontium

Strontium

Element 38 of Periodic table is Strontium with atomic number 38, atomic weight 87.62. Strontium, symbol Sr, has a Face Centered Cubic structure and Silver color. Strontium is a alkaline earth metal element. Trivial name of Strontium is alkaline earth metals*. Know everything about Strontium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure.

38 Sr - Strontium | SchoolMyKids

Strontium is a chemical element with symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. The metal turns yellow when it is exposed to air.

How to Locate Strontium 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 38 to find Strontium 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 Strontium on periodic table look for cross section of group 2 and period 5 in the modern periodic table.

Table of Contents

Strontium History

The element Strontium was discovered by William Cruickshank (chemist) in year 1790 in United Kingdom . Strontium derived its name from Strontian, a small town in Scotland

Strontium Presence: Abundance in Nature and Around Us

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

  Ppb by weight (1ppb =10^-7 %)
Abundance in Universe 4×10-6%
Abundance in Sun 5×10-6%
Abundance in Meteorites 8.7e-06
Abundance in Earth's Crust 0.00036
Abundance in Oceans 8.1e-06
Abundance in Humans 4.6e-06

Crystal Structure of Strontium

The solid state structure of Strontium is Face Centered Cubic.

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
608.49 608.49 608.49 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 Fm_ 3m 38 Sr Strontium - Crystal Structure | SchoolMyKids
Space Group Number 225
Crystal Structure Face Centered Cubic

Strontium Atomic and Orbital Properties

Strontium atoms have 38 electrons and the electronic shell structure is [2, 8, 18, 8, 2] with Atomic Term Symbol (Quantum Numbers) 1S0.

Atomic Number 38
Number of Electrons (with no charge) 38
Number of Protons 38
Mass Number 88
Number of Neutrons 50
Shell structure (Electrons per energy level) [2, 8, 18, 8, 2]
Electron Configuration [Kr] 5s2
Valence Electrons 5s2
Oxidation State 1;2
Atomic Term Symbol (Quantum Numbers) 1S0

Shell Structure of Strontium - Electrons per energy level

38 Sr Strontium - 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
5 O 2

Ground State Electronic Configuration of Strontium - neutral Strontium atom

The ground state electronic configuration of Neutral Strontium atom is [Kr] 5s2. The portion of Strontium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Kr]. 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 5s2, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Strontium

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

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

Atomic Structure of Strontium

Strontium atomic radius is 219 pm, while it's covalent radius is 192 pm.

Atomic Radius

219 pm (2.19 Å)

Atomic Volume 33.3155893536 cm3
Covalent Radius 192 pm (1.92 Å)
Van der Waals Radius N/A
Neutron Cross Section 1.2 σa/barns

Atomic Spectrum of Strontium

Atomic Spectrum of Strontium | SchoolMyKids

Strontium Chemical Properties: Strontium Ionization Energies and electron affinity

The electron affinity of Strontium is 5.03 kJ/mol

Valence 2
Electronegativity 0.95
ElectronAffinity 5.03 kJ/mol

Ionization Energy of Strontium

Refer to table below for Ionization energies of Strontium

Ionization energy number Enthalpy - kJ/mol
1 549.5
2 1064.2
3 4138
4 5.5×103
5 6910
6 8760
7 10230
8 1.18×104
9 1.56×104
10 1.71×104

Strontium Physical Properties

Refer to below table for Strontium Physical Properties

Density 2.63 g/cm3
Molar Volume 33.3155893536 cm3

Elastic Properties

Young Modulus N/A
Shear Modulus 6.1 GPa
Bulk Modulus N/A
Poisson Ratio 0.28

Hardness of Strontium - Tests to Measure of Hardness of Element

Mohs Hardness 1.5 MPa
Vickers Hardness N/A
Brinell Hardness N/A

Strontium Electrical Properties

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

Electrical Conductivity 7.7×106 S/m
Resistivity 1.3×10-7 m Ω
Superconducting Point N/A

Strontium Heat and Conduction Properties

Thermal Conductivity 35 W/(m K)
Thermal Expansion 0.0000225 K-1

Strontium Magnetic Properties

Magnetic Type Paramagnetic
Curie Point N/A
Mass Magnetic Susceptibility 1.32×10-9
Molar Magnetic Susceptibility 1.16×10-10
Volume Magnetic Susceptibility 3.47×10-6

Optical Properties of Strontium

Refractive Index N/A

Acoustic Properties of Strontium

Speed of Sound N/A

Strontium Thermal Properties - Enthalpies and thermodynamics

Refer to table below for Thermal properties of Strontium

Melting Point 1050 K (777 °C)
Boiling Point 1655 K (1382 °C)
Critical Temperature N/A
Superconducting Point N/A

Enthalpies of Strontium

Heat of Fusion 8 kJ/mol
Heat of Vaporization 137 kJ/mol
Heat of Combustion N/A

Strontium Isotopes - Nuclear Properties of Strontium

Isotopes of rhodium. Naturally occurring Strontium has 4 stable isotope - 84Sr, 86Sr, 87Sr, 88Sr.

Isotope Isotope Mass % Abundance T half Decay Mode
73Sr  
74Sr  
75Sr  
76Sr  
77Sr  
78Sr  
79Sr  
80Sr  
81Sr  
82Sr  
83Sr  
84Sr   0.56% Stable N/A
85Sr  
86Sr   9.86% Stable N/A
87Sr   7% Stable N/A
88Sr   82.58% Stable N/A
89Sr  
90Sr  
91Sr  
92Sr  
93Sr  
94Sr  
95Sr  
96Sr  
97Sr  
98Sr  
99Sr  
100Sr  
101Sr  
102Sr  
103Sr  
104Sr  
105Sr  

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS Number CAS7440-24-6
RTECS Number N/A
DOT Hazard Class 4.2
DOT Numbers 1383
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) CAS7440-24-6
CID Number CID5359327
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