How many protons and neutrons are in an atom of 209 Po?
Diagram of the nuclear composition, electron configuration, chemical data, and valence (outer electron) orbitals of an atom of polonium-209 (atomic number: 84), an isotope of this element. The nucleus consists of 84 protons (red) and 125 neutrons (orange).
What is polonium used for today?
Because of its high radioactivity, polonium has few commercial applications. Among the element’s limited uses are eliminating static electricity in machinery and removing dust from photographic film. The element is also used as a lightweight heat source for thermoelectric power in satellites and other spacecraft.
What is bismuth used for today?
Bismuth finds its main uses in pharmaceuticals, atomic fire alarms and sprinkler systems, solders and other alloys and pigments for cosmetics, glass and ceramics. It is also used as a catalyst in rubber production.
How many electrons does lead 209 have?
Lead Atomic and Orbital Properties Lead atoms have 82 electrons and the electronic shell structure is [2, 8, 18, 32, 18, 4] with Atomic Term Symbol (Quantum Numbers) 3P0.
How many neutrons does PO 209 have?
Fill in the known values where N represents the number of neutrons. Rewrite the equation as 84+N=209 84 + N = 209 ….Chemistry Examples.
| 84 | Atomic Number |
|---|---|
| Po | Element Symbol |
| Polonium | Element Name |
| 209 | Average Atomic Mass |
What is the half life of bismuth 209?
1019 years
The scientists registered 128 alpha-particle events over 5 days and found an unexpected line in the spectrum at 3.14 MeV – now attributed to bismuth-209 decay. The half-life was calculated to be (1.9 +/- 0.2 ) x 1019 years, which is in good agreement with the theoretical prediction of 4.6 x 1019 years.
How is radium created?
Radium is a radionuclide formed by the decay of uranium and thorium in the environment. The most common isotopes. For example, uranium has thirty-seven different isotopes, including uranium-235 and uranium-238. of radium are Ra-226 and Ra-228.
When was radium discovered?
December 21, 1898Radium / Discovered
What is polonium found in?
1898Polonium / Discovered
Is Lithium a metal?
Lithium: the lightest of all metals A highly reactive and inflammable element, lithium (Li) is the first alkali metal in the periodic table which consists of elements such as sodium (Na).
Is PB 209 an isotope?
Bismuth-209 (209Bi) is the isotope of bismuth with the longest known half-life of any radioisotope that undergoes α-decay (alpha decay)….Bismuth-209.
| General | |
|---|---|
| Parent isotopes | 209Pb (β−) 209Po (β+) 213At (α) |
| Decay products | 205Tl |
| Isotope mass | 208.9803987 u |
| Spin | 9/2− |
Is lead 209 stable?
Lead is the element with the heaviest stable isotope, 208Pb. (The more massive 209Bi, long considered to be stable, actually has a half-life of 2.01×1019 years.) A total of 43 lead isotopes are now known, including very unstable synthetic species.
What is the half life of polonium 209?
Polonium-209 atom is the radioactive isotope of polonium with relative atomic mass 208.982404 and half-life of 102 years. Works produced by the U.S. government are not subject to copyright protection in the United States.
What is the atomic number of an element?
The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
How many elements have been identified as of 2019?
This is a list of the 118 chemical elements which have been identified as of 2019. A chemical element, often simply called an element, is a species of atoms which all have the same number of protons in their atomic nuclei (i.e., the same atomic number, or Z ).
What is the IUPAC name of element 112?
^ “IUPAC (International Union of Pure and Applied Chemistry): Element 112 is Named Copernicium”. IUPAC. 20 February 2010. Archived from the original on 24 February 2010.