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If you ask somebody who remembers a bit of their high school chemistry, “What's the heaviest stable (non-radioactive) element?” they'll usually answer “Lead.” If you pose the same question to a chemist, they'll probably glance at the periodic table on the wall and respond “Bismuth.” Reality is somewhat more complicated …
What is the highest non radioactive element?
bismuth-209 Bismuth-209
| General | |
|---|---|
| Symbol | 209Bi |
| Names | bismuth-209, Bi-209 |
| Protons (Z) | 83 |
| Neutrons (N) | 126 |
Which is not a radioactive element?
The correct answer is Cadmium. Cadmium is not a radioactive element.
How many non radioactive elements are there?
About 338 nuclides are found naturally on Earth. These comprise 252 stable isotopes, and with the addition of the 34 long-lived radioisotopes with half-lives longer than 100 million years, a total of 286 primordial nuclides, as noted above.
What is the rarest non radioactive metal?
The rarest stable metal is tantalum. The rarest metal on earth is actually francium, but because this unstable element has a half life of a mere 22 minutes, it has no practical use.
What is the 126 element?
Unbihexium
| Unbihexium | |
|---|---|
| Pronunciation | /ˌuːnbaɪˈhɛksiəm/ (OON-by-HEK-see-əm) |
| Alternative names | element 126, eka-plutonium |
| Unbihexium in the periodic table |
Which is the rarest element on the Earth?
element astatine A team of researchers using the ISOLDE nuclear-physics facility at CERN has measured for the first time the so-called electron affinity of the chemical element astatine, the rarest naturally occurring element on Earth.
Is Pu radioactive?
Plutonium (chemical symbol Pu) is a silvery-gray, radioactive metal that becomes yellowish when exposed to air. Plutonium is considered a man-made element, although scientists have found trace amounts of naturally occurring plutonium produced under highly unusual geologic circumstances.
What does lead 210 mean?
Lead 210Pb is a naturally occurring radioactive nuclide element of the uranium (238U) radioactive series. It is produced as a result of the decay of so-called short-lived progeny of 222Rn, which comes from the decay of 214Po (99.98%) and 214Bi by 219Tl (0.02%).
What is the rarest thing on Earth?
20 Rare And Bizarre Things That Actually Exist On Our Earth
- 1 The Underground City Of Derinkuyu. Photo Via: wikipedia.com.
- 2 The Gate Of The Sun. Photo Via: wikipedia.com. …
- 3 Reflective Salt Flats. …
- 4 Volgograd Discs. …
- 5 Underwater Forest. …
- 6 The Longyou Grottoes. …
- 7 Shores Of Vaadhoo. …
- 8 The Glowing Forest. …
