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Any time you see the Atomic Mass of an element in brackets on the periodic chart, that number represents the mass number of the longest-lived or best-known isotope of that element. In other words there is no stable isotope, i.e. all forms of it are radioactive.
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∙ 13y ago
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Why is the atomic mass of technetium usually in brackets?
The brackets are used for isotopic elements--those with variable numbers of neutrons. The atomic weight of the most stable isotope is the one in brackets. You know, this is a terrible way to be getting your chemistry coursework done. Here you go: www.lenntech.com/periodic-chart-elements/tc-en.htm There you go.
Why is there no technetium in nature?
Technetium exist in nature only in ultratraces; being unstable technetium technetium was lost by radioactive decay.
Is technetium magnetic or not magnetic?
Technetium is paramagnetic.
What the number of protons in technetium?
Technetium has 43 protons.
What do nickel and technetium have in common?
Nickel and technetium are metals.
Why is the atomic mass of technetium usually in brackets?
The brackets are used for isotopic elements--those with variable numbers of neutrons. The atomic weight of the most stable isotope is the one in brackets. You know, this is a terrible way to be getting your chemistry coursework done. Here you go: www.lenntech.com/periodic-chart-elements/tc-en.htm There you go.
Why is there no technetium in nature?
Technetium exist in nature only in ultratraces; being unstable technetium technetium was lost by radioactive decay.
What is the odor for technetium?
Technetium is odorless.
Is technetium odorless?
Technetium is odorless.
Is technetium from Japan?
Technetium is not from Japan.
Why is technetium a metal?
Technetium is a metal.
Does technetium have a taste?
Technetium was not tasted !
Is technetium nonmetal metal or metalloid?
its a metal
Is technetium hard?
The Brinell hardness of technetium is 112.The Vickers hardness of technetium is 151.
How hard is technetium?
The Brinell hardness of technetium is 112.The Vickers hardness of technetium is 151.
Where can you buy technetium?
Technetium is not a material to be sold to anyone on the counter.
Is technetium magnetic or not magnetic?
Technetium is paramagnetic.
