What is the formula for electronic configuration?
What is the formula for electronic configuration?
Writing Electron Configurations The maximum number of electrons that can be accommodated in a shell is based on the principal quantum number (n). It is represented by the formula 2n2, where ‘n’ is the shell number.
How many valence electrons are in thallium?
three
What is thallium used for?
Uses of thallium Thallium is used in photoresistors, infrared optical equipment, low melting glasses and several other applications. Thallium sulfate has been used as a rodent and ant killer because it’s odorless and tasteless. However, the use of the product has been prohibited since 1972 in the United States
Where is thallium in everyday life?
Presently our sources of thallium rely on naturally occurring deposits. Thallium uses today commonly include the production of electronic devices, fiber optics, camera lenses, switches, and closures. Thallium metal is used most notably by the semiconductor, fiber optic, and the glass lens industries
Where is thallium mined?
the USA
How much does thallium cost?
Commercial thallium metal (99%) costs about $40/lb….
| Atomic Number: | 81 |
|---|---|
| Atomic Weight: | 204.37 |
| Electron Configuration: | [Xe]6s24f145d106p1 |
| Total Isotopes | 78 |
| Total Isomers | 41 |
Is thallium man made?
Thallium can also be obtained from the smelting of lead and zinc ores. Naturally occurring thallium is a mixture of its two stable isotopes, 203Tl and 205Tl with natural abundances of 29.5% and 70.5% respectively.
Why is Thallium 201 used in medicine?
Thallium-201 is a radiopharmaceutical agent used in the diagnosis of coronary artery disease and parathyroid hyperactivity. Other useful applications for a thallium-201 scan like tumor diagnosis and olfacto-scintigraphy are being explored and have shown promising results in various studies.
Is thallium found in nature?
Thallium is naturally present in the environment, most notably in its terrestrial elements, although usually at low concentrations.
What are the properties of thallium?
Physical properties Thallium is a heavy, bluish-white metal that resembles lead, element 82. Thallium is very soft and melts easily. It is soft enough to cut with an ordinary knife and will leave a mark on paper if rubbed across it. Thallium has a melting point of 302°C (576°F) and a boiling point of 1,457°C (2,655°F).
Is Thallium a main group element?
Thallium (Tl), chemical element, metal of main Group 13 (IIIa, or boron group) of the periodic table, poisonous and of limited commercial value. Like lead, thallium is a soft, low-melting element of low tensile strength. Freshly cut thallium has a metallic lustre that dulls to bluish gray upon exposure to air.
What is a thallium scan?
A thallium (or cardiolite) scan uses a radioactive tracer to see how much blood is reaching different parts of your heart. These tests are the more common forms of tests called nuclear medicine scans. You may also hear them called: thallium myocardial imaging.
How is thallium different from the other five elements?
Thallium is different from the other five elements Tl has 3 valency whereas lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs) has only 1 valency.
What is thallium freezing point?
304 °C
What does thallium react with?
Thallium metal reacts vigorously with fluorine, F2, chlorine, Cl2, and bromine, Br2, to form the dihalides thallium(III) fluoride, TlF3, thallium(III) chloride, TlCl3, tand hallium(III) bromide, TlBr3, respectively.
Is thallium common or rare?
Thallium (Tl) is a rare but environmentally widely dispersed element with an abundance of 0.003% in the earth crust. Thallium is mainly present in the sulfide ores of zinc, copper, and lead, and also in coal.
How is thallium produced?
Thallium is found in several ores. One of these is pyrites, which is used to produce sulfuric acid. Some thallium is obtained from pyrites, but it is mainly obtained as a by-product of copper, zinc and lead refining. Thallium is also present in manganese nodules found on the ocean floor.
What family is thallium in?
aluminum family
Does thallium react with water?
Reactions with water Thallium tarnishes slowly in moist air or dissolves in water to yield poisonous thallium(I) hydroxide.
Why does thallium act as alkali metals?
Answer: Thallium is typical of the Group 13 elements in having an s2p1outer electron configuration. In water the colourless, more stable thallous ion, Tl+, resembles the heavier alkali metal ions and silver; the compounds of thallium in its +3 state are easily reduced to compounds of themetal in its +1 state