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A small amount of technetium is now in our earths environment, this is due to: - Nuclear bombs - Nuclear testing - Nuclear Accidents eg the Chernobyl disaster this is where technetium come from in small amounts in our environment. - There is additionally technetium present quite abundantly (up to about 5%) in nuclear reactor waste, and a small amount of this has escaped to the environment. - And finally, technetium is naturally present in our environment, but only in really tiny quantities in uranium ore. One tonne of a high grade uranium ore might typically contain 0.1 to 0.2 micrograms of technetium, which can be detected by its radiation signal. A very small proportion of natural uranium atoms undergo spontaneous fission (break in half) in the natural environment, and technetium is a likely product.
Wiki User
∙ 14y ago
Wiki User
∙ 10y agoBecause it has no stable isotopes, that means that it's radioactive so it decays with time.The problem is that it decays so fast to remain one earth, most of the isotopes have a half-life ( time required for a quantity to fall to half its value as measured at the beginning of the time period) of less than an hour so if it ever existed on earth, now it's gone.
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Is it true that on earth 90 elements occur naturally?
Yes, at least 91 elements occur naturally: all of those with atomic numbers of 92 or less except technetium. This still means that the problem "statement" is true, because it does not contain any limiting word such as "only" to modify the number 90. (It is equally true that 2 elements occur naturally.)
How does water naturally occur on earth?
Water naturally occurs on earth from rain.
How many known elements are there on earth are naturally made?
92 elements occur naturally on the earth.
Do all the 116 known elements occur naturally on Earth?
No, only the elements up to Uranium (Z=92) occur naturally on Earth. The rest have only been made synthetically, because of their radioactivity which renders them unstable and thus unable to exist naturally. The synthetically made elements are called transuranic elements.
Are most of the actinides occur naturally in earth's crust?
no they do not
Is technetium found in bones?
No, Technetium does no occur naturally on earth except in trace amounts in molybdenum deposits.
Why is there naturally occurring technetium on earth?
Natural technetium exist only in infinitesimal traces in some uranium deposits.
Is it true that on earth 90 elements occur naturally?
Yes, at least 91 elements occur naturally: all of those with atomic numbers of 92 or less except technetium. This still means that the problem "statement" is true, because it does not contain any limiting word such as "only" to modify the number 90. (It is equally true that 2 elements occur naturally.)
How many elements occur natural?
Elements 1-92 except 43 (technetium) and 61 (promethium) occur naturally. So, there are 90 naturally occurring elements.
Does zirconium occur naturally on earth?
Yes, it occurs naturally on earth.
Which are the naturally occurring elements?
Everything in the Periodic Table up to Uranium (92). Wrong, not everything, the elements Technetium (43) and Promethium (61) do not occur naturally.
How many different kinds of atom occur naturally on earth?
94 kinds of atoms occur naturally on earth
What state of matter does technetium naturally take?
Technetium is a solid metal.
How many naturally occurring isotopes are in technetium?
Technetium is a man made element.
Where was technetium mostly found?
Technetium is not a naturally-occurring element; it was created in a laboratory.
What does not occur naturally on earth?
nobeilum
How does water naturally occur on earth?
Water naturally occurs on earth from rain.
