43 Tc Technetium 97.0 u

Technetium

周期
5
族
7
ブロック
d-ブロック
相 (STP)
Solid

Technetium was the first artificially produced element. Its isotope Tc-99m is widely used in medical diagnostic imaging.

About Technetium

Technetium (Tc) holds a singular place in chemistry as the first element to be produced artificially, its name deriving from the Greek word for artificial. Element 43 sits in group 7 of period 5 in the d-block, with an atomic mass of 97 and the electron configuration [Kr] 4d⁵ 5s². Every isotope of technetium is radioactive, and the element has no stable form. Its most widely used isotope, technetium-99m, is a workhorse of nuclear medicine, employed in millions of diagnostic imaging procedures each year to visualize organs and detect disease. With a Pauling electronegativity of 1.9, technetium behaves as a typical transition metal, forming compounds across several oxidation states despite its scarcity in nature.

物理的特性

原子質量 97.0 u
STPにおける相 Solid

電子的特性

電気陰性度 1.9

電子配置

配置 [Kr] 4d⁵ 5s²

Electron Shell Configuration

Technetium electron shell configuration Tc 2e⁻ 8e⁻ 18e⁻ 13e⁻ 2e⁻
Electron shell structure of Technetium — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 13
5 (O) 2

Position in Periodic Table

Technetium position in the periodic table Tc

ブロックと周期

ブロック

s p d f

周期

1 2 3 4 5 6 7

周期表

ランタノイド アクチノイド

Tc を含む反応

Technetium-99m Gamma Decay

⁹⁹ᵐTc → ⁹⁹Tc + γ

Nuclear

遷移金属 をもっと見る

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

Frequently Asked Questions

What is Technetium?
Technetium (Tc) is a chemical element with atomic number 43. It is a solid at standard temperature and pressure, classified as a 遷移金属.
What are the key properties of Technetium?
Technetium has an atomic mass of 97.0 u.
What is the electron configuration of Technetium?
The electron configuration of Technetium is [Kr] 4d5 5s2. It is in the d-block of the periodic table.
What is the electronegativity of Technetium?
Technetium has an electronegativity of 1.9 on the Pauling scale.