テクネチウム

テ

ク

ネ

チ

ウ

ム

Meanings

1

noun

technetium (Tc)

Chemical element with atomic number 43. A radioactive transition metal; all isotopes are radioactive.

テクネチウムは自し然ぜん界かいにはほとんど存そん在ざいしない元げん素そです。
Technetium is an element that hardly exists in nature.
医い療りょう用ようの放ほう射しゃ性せい同どう位い

体たい

と

し

て

テクネチウム

99

m

が

使つか

わ

れ

て

い

ます

。

Technetium-99m is used as a medical radioisotope.

マンガン
Manganese (Mn) is the element above technetium in the periodic table; unlike technetium, it is stable and abundant in nature.
レニウム
Rhenium (Re) is the element below technetium in the periodic table; it is also a rare transition metal but has stable isotopes.

From English 'technetium', coined from Greek 'technetos' (artificial), because it was the first artificially produced element.