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Selenium
Selenium (Se) is a nonmetal (recognized a metalloid) related to sulfur and is often used in glassmaking. Although it can be toxic, it is needed in trace amounts for proper body function.
424 Questions
Why do selenium and sulfur have similar chemical properties in terms of electron configuration?
Selenium and sulfur have similar chemical properties because they are in the same group on the periodic table, known as the chalcogens. Both elements have similar outer electron configurations, with sulfur having 6 electrons in its outer shell and selenium having 6 as well. This similarity in electron configuration leads to comparable chemical behavior in terms of oxidation states and reactivity.
Why is the metal plate coated with selenium in a photocopier?
First a special selenium coated, flat metal plate is positively charged. Light stones through a lens then projects an image of the page to be copied onto the charged plate. Whenever the light falls on the selenium plate the plate becomes a conductor and the positive charge is conducted away from the selenium by the metal plate.
What is the name for a selenium ion with 36 electrons?
When selenium gains two electrons, it becomes the selenide ion.
Selenium is a non-metal element, so it does not have a distinct color in its pure form. However, when combined with other elements in compounds, selenium can exhibit colors ranging from red to black, depending on the specific compound.
Selenium can be reactive and form compounds with other elements. It reacts with oxygen to form oxides and with water to form various compounds. However, it is less reactive compared to other elements in the same group like sulfur and tellurium.
What is the chemical formula for selenium monoxide?
SeO2 is the chemical formula for selenium dioxide.
No, selenium is not magnetic. It is a non-magnetic element with no magnetic properties.
Is selenium a rare earth element?
No, selenium is not a rare earth element. It is a nonmetallic element that is commonly found in the earth's crust and is used in various industrial applications. Rare earth elements are a group of 17 elements that are found in limited quantities and have unique properties.
How many protons and neutrons does selenium have?
This isotope is shown in hyphen notation: on the left side of the hyphen is the isotope's name, and on the right side is the isotope's mass number. The mass number of an element is the total number of particles in the nucleus (the number of protons + neutrons an atom has).
In order to get the number of protons an atom has, find its atomic number on the periodic table. Selenium's atomic number is 34.... wait, this doesn't make any sense. If it has a mass number of 30 and an atomic number of 34, it has -4 neutrons.
I'm sorry, but it looks like you have the problem wrong.
What is the name of the Dick Francis novel that involves people being poisoned with selenium?
***Semi-spoiler alert! *** In the 1982 novel "Banker", by Dick Francis, selenium is used not for the purpose of killing people, but rather to create birth defects in racehorses. The bad guys are willing to murder- but not with the poisonous element mentioned. One of Francis' best, in my humble opinion.
Does selenium have more in common with sulfur or bromine?
Selenium is more in common with Sulfur because they are in the same group. They have the same number of valence electrons and the only elements Selenium is related to is Sulfur and Tellurium. Anna C.
Why is selenium used in solar panels?
ScienceDaily (Aug. 3, 2010) - Call it the anti-sunscreen. That's more or less the description of what many solar energy researchers would like to find -- light-catching substances that could be added to photovoltaic materials in order to convert more of the sun's energy into carbon-free electricity.See Also:
Matter & Energy
- Solar Energy
- Energy Technology
- Nuclear Energy
- Physics
- Energy Policy
- Alternative Fuels
- Biomass
- Solar panel
- Fuel cell
- Liquid nitrogen economy
Research reported in the journalApplied Physics Letters, published by the American Institute of Physics (AIP), describes how solar power could potentially be harvested by using oxide materials that contain the element selenium. A team at the Lawrence Berkeley National Laboratory in Berkeley, California, embedded selenium in zinc oxide, a relatively inexpensive material that could be promising for solar power conversion if it could make more efficient use of the sun's energy. The team found that even a relatively small amount of selenium, just 9 percent of the mostly zinc-oxide base, dramatically boosted the material's efficiency in absorbing light.
"Researchers are exploring ways to make solar cells both less expensive and more efficient; this result potentially addresses both of those needs," says author Marie Mayer, a fourth-year University of California, Berkeley doctoral student based out of LBNL's Solar Materials Energy Research Group, which is working on novel materials for sustainable clean-energy sources.
Mayer says that photoelectrochemical water splitting, using energy from the sun to cleave water into hydrogen and oxygen gases, could potentially be the most exciting future application for her work. Harnessing this reaction is key to the eventual production of zero-emission hydrogen powered vehicles, which hypothetically will run only on water and sunlight. Like most researchers, Mayer isn't predicting hydrogen cars on the roads in any meaningful numbers soon. Still, the great thing about solar power, she says, is that "if you can dream it, someone is trying to research it."
How many core electrons does selenium have?
Selenium is Atominc number: 34
It has 6 Valence electrons
Therefore you take 6 from 34: 28 core electrons
What is the state of matter for the element selenium?
Selenium is a solid at room temperature and pressure, making it a solid state of matter.
yes selenium is brittle, it it is struck it will usually crumble.
Is selenium the same as selenate?
No, selenium and selenate are not the same. Selenium is a chemical element with atomic number 34, while selenate is the anionic form of selenium usually found in compounds like sodium selenate. Selenate is a common form of selenium used in supplements and as a source of selenium in the environment.
What is selenium's boiling point?
Melting point (of gray selenium) 217°C
Boiling point (gray) 684.9°C
either i didn't notice it for a long time, but Perrigo brand selenium sulfide 2.5 lotion which I've got smells like dog piles or body odor. i was wondering what that stink was until i finally smelled my pillow, rubbed my hands in my hair, PHEW!!!!
What is the valence electron configuration of selenium?
The valence electron configuration of selenium is 4s2 4p4, meaning it has 6 valence electrons.
What is the dangers of selenium?
Consuming too much selenium can lead to selenosis, causing symptoms like hair loss, fatigue, and gastrointestinal issues. In extreme cases, it can lead to more serious conditions like kidney failure and heart problems. It's important to stay within the recommended daily intake levels to avoid these risks.
The cost of selenium can vary depending on the form and brand. Generally, selenium supplements can range from $5 to $20 for a month's supply. It's best to check with different retailers or online stores for the most current prices.
What is selenium melting point?
Selenium melts 221.14 C on the ITS-90 Scale. Reference: Page 230 Guinness Book of Answers 9th Edition. Selenium melts at 221.18 C on the ITS-68 Scale. Reference Page 219 Guinness Book of Answers 8th Edition. T - T90 is approximately +0.011 K at this temperature according to the BIPM. T90 - T68 is approximately -0.040 K at this temperature according to Page 1-18 of the 74th Edition of the CRC Handbook of Chemistry and Physics. Page 4-122 of this Handbook gives 221 C for the melting point of Selenium. Newer editions of the CRC Handbook of Chemistry and Physics give 220.5 and 220.8 C. But these values are probably a little too low due to small amounts of impurities. The thermodynamic temperature of the melting point of selenium is 221.16 C plus or minus 0.02 C. or 494.31 K plus or minus 0.02 K. This is probably the most accurate value known for the melting point of selenium. This is for ultrapure selenium.
