Elements
43

Tc

Technetium

Technetium (Tc) is a silvery-gray metal that has the atomic number 43 in the periodic table. It is a Transition metal and located in Group 7 of the periodic table. It has the symbol Tc.

Technetium is produced mostly as a synthetic element with very little existing in the earths crust. If it occurs naturally it is from spontaneous fission products in uranium and thorium ores. Technetium’s properties were predicted by Mendeleev before it was discovered when he noted the gap in the periodic table. In 1925 Ida Tacke, Walter Noddack and Otto Berg analysed platinum and columbite ores in hope of discovering element 43. After a series of X-ray analysis they published evidence claiming to have discovered element 43. Whilst this evidence was received skeptically it was replicated in a study in 1999. Credit for the discovery of Technetium is is given to Carlo Perrier and Emilio Segre who bombarded a sample of Molyndenum with deuterium nuceli and found several Technetium isotopes made synthetically. Uses of Technetium 99 is a stable isotope and emits gamma rays and can me used by gamma camera for diagnosis in hospitals. It is located in Group 7 as a Transition metal. It has a melting point of 2157°c and a boiling point of 4265°c.

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FAQ's

What is the Melting Point for Technetium?

Technetium has a Melting Point of 2172°F, meaning at 2172°F it will turn to a liquid.

What is the Boiling Point for Technetium?

Technetium has a Boiling Point of 4877°F, meaning at 4877°F it will turn to a Gas.

What is the Electronegativity of Technetium?

Technetium's Electronegativty is 1.9. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Technetium?

Technetium has a Heat of Vaporization of 660 kJ/mol.

Uses

Added to iron in quantities as low as 55 part-per-million transforms the iron into a corrosion-resistant alloy.

Sources

Made first by bombarding molybdenum with deuterons (heavy hydrogen) in a cyclotron.

43
Protons
43
Electrons
54
Neutrons

Tc

Element Symbol
Tc
Atomic Weight
97
Atomic Number
43
State
Solid
Melting Point
Unknown
2172
°C
Boiling Point
4877
Unknown
°C
Heat of Vaporization
660
Unknown
kJ/mol
Crystal Structure
Hexagonal
Thermoconductivity
0.506
Unknown
W/cmK
Shells
2,8,18,13,2
Group
Transition Metal
Period
5
Block
D Block
Orbitals
[Kr] 4d5 5s2
Coefficient of Thermal Expansion
8 10^-6 K^-1
Covalent Radius
1.27 Å
Density at 293K
11.5 g/cm³
Electrical Conductivity
0.067 10^6/cm ohm
First Ionization Potential
7.28 V
Second Ionization Potential
15.26 V
Third Ionization Potential
29.54 V
Ionic Radius
--
Oxydation States
(7),6,4
Lattice Parameter
2.735 Å
Lattice Parameter 2
--
Lattice Parameter 3
--
Pronounced

tek-NEE-shi-em

Discovered by

Carlo Perrier, Émillo Segrè

Discovery date

1937

Orbital configuration
2,8,18,13,2

Download the Periodic Table

Explore Other Transition Metals

102.905
45

Rh

Rhodium
183.84
74

W

Tungsten
196.967
79

Au

Gold
55.845
26

Fe

Iron
186.207
75

Re

Rhenium
267
104

Rf

Rutherfordium
50.942
23

V

Vanadium
95.95
42

Mo

Molybdenum
58.933
27

Co

Cobalt
51.996
24

Cr

Chromium
63.546
29

Cu

Copper
285
112

Cn

Copernicium
190.23
76

Os

Osmium
44.956
21

Sc

Scandium
47.867
22

Ti

Titanium
192.217
77

Ir

Iridium
180.948
73

Ta

Tantalum
112.414
48

Cd

Cadmium
65.38
30

Zn

Zinc
106.42
46

Pd

Palladium
178.49
72

Hf

Hafnium
91.224
40

Zr

Zirconium
107.868
47

Ag

Silver
88.906
39

Y

Yttrium
270
107

Bh

Bohrium
200.592
80

Hg

Mercury
58.693
28

Ni

Nickel
270
105

Db

Dubnium
101.07
44

Ru

Ruthenium
269
106

Sg

Seaborgium
270
108

Hs

Hassium
195.084
78

Pt

Platinum
54.938
25

Mn

Manganese
92.906
41

Nb

Niobium
Transition metal is any of various chemical elements that have valence electrons (electrons that can participate in the formation of chemical bond) in two shells instead of only one. They form group 3 (IIIb) through group 12 (IIb).
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