Selenium

The molar mass of aluminum is 26.98 g/mol, and the molar mass of selenium is 78.96 g/mol. Using the given masses, we find that there are 0.270 moles of aluminum and 0.499 moles of selenium in the compound. Dividing by the smallest number of moles (0.270) gives us the empirical formula Al2Se3.

1 mol of sulfur contains 6.02 x 1023 molecules (avogadro constant).

In one molecule of sulfur, S8, there are 8 sulfur atoms.

Thus, number of atooms in 7.20 moles of sulfur

= 8 x 7.20 x 6.02 x 1023

= 3.47 x 1025

Note: Sulfur does not usually exist in a monatomic form but instead forms cyclic octatomic molecules with molecular formula S8.

It is generally safe for pregnant women to consume selenium in recommended amounts through food sources. However, it's important to avoid excessive intake of selenium supplements during pregnancy, as high levels can be harmful to the developing fetus. It's best to consult with a healthcare provider before taking any supplements during pregnancy.

Oxygen has 6 valence electrons, while selenium has 6 valence electrons as well. Both oxygen and selenium are in the same group, Group 16 (also known as Group VIA or Group 6) of the periodic table. They are not in the same period – oxygen is in period 2, while selenium is in period 4.

Tellurium - Tellus, which is latin for earth.

Helium - Helios, meaning the sun.

Selenium- Selene, which is Greke for moon.

D. Oxygen. Oxygen is the most nonmetallic element in group 16, also known as the chalcogens. It has a high electronegativity and tends to gain electrons to form negative ions.

Because of its photovoltaic and photoconductive properties, selenium is used in photocopying, photocells, light meters and solar cells. Its use as a photoconductor in plain-paper copiers once was a leading application but in the 1980s, the photoconductor application declined (although it was still a large end-use) as more and more copiers switched to the use of organic photoconductors. It was once widely used in selenium rectifiers.

Men typically need more selenium than women because they have larger body mass and muscle mass, which may require higher selenium intake for optimal health. Selenium plays a crucial role in sperm production and testosterone metabolism, which are important functions for men's reproductive health. It also helps to support the immune system and protect against oxidative damage, which may be particularly beneficial for men who are exposed to higher levels of physical and environmental stress.

CANDID - TV is the brand name of shampoo containing Selenium sulfide in India.

It is made by GLENMARK Laboratories.

The red-colored α, β and γ forms are produced from solutions of black selenium by varying evaporation rates of the solvent (usually CS2). They all have relatively low, monoclinic crystal symmetries and contain nearly identical puckered Se8 rings arranged in different fashions, as in sulfur. The packing is most dense in the α form. In the Se8 rings, the Se-Se distance is 233.5 pm and Se-Se-Se angle is 105.7 degrees. Other selenium allotropes may contain Se6 or Se7 rings.

Jons Jacob was the man to discover Selenium.

Excited state selenium refers to selenium atoms or ions that have absorbed energy, causing their electrons to move to higher energy levels. This temporary configuration is unstable, and the electrons will eventually return to their original energy levels, releasing the absorbed energy as light. This process is the basis for selenium's use in photovoltaic cells and other light-sensitive technologies.

Selenium ions refer to selenium atoms that have gained or lost electrons to become positively or negatively charged. They can exhibit different chemical properties compared to neutral selenium atoms, depending on the number of electrons gained or lost.

Selenium has 6 Valence Electrons.

The Electron Configuration is 2, 8, 18, 6

Nonmetal because Selenium is used to make light sensors so it cant melt at low temperatures and it conducts electricity at a low level like a lot of non - metals
Selenium is considered a nonmetal.

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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.

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.

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.

SeO2 is the chemical formula for selenium dioxide.

No, selenium is not magnetic. It is a non-magnetic element with no magnetic properties.