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Selenium is a nonmetal element with the atomic number 34. It is a brittle solid at room temperature with a metallic luster. It exhibits both photovoltaic and photoconductive properties, making it useful in solar cells and photocopying.
Selenium is a semiconductor that can conduct electricity under certain conditions. Its chemical properties include forming compounds with both metallic and nonmetallic elements, and it is essential for various biological functions in trace amounts.
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What is the composition and structure of selenium?
Selenium is a nonmetal element that belongs to the oxygen group of the periodic table. Its atomic number is 34, and it has multiple allotropes with different physical and chemical properties. Selenium exists in various forms, including elemental selenium, selenide ions, selenite ions, and selenate ions.
When do the physical and chemical properties change?
Physical and chemical properties change as the result of a chemical change, which produces new products with different physical and chemical properties than the reactants.
Is selenium a heterogeneous mixture?
no. it is an element and will be homogeneous
What elements with similar properties as selenium?
Oxygen, Sulphur, Selenium, Tellurium, Polonium, and Livermorium. Have similar chemical properties as they are all in Group VIA (16). However, the last two are radio-active and not found in the open lab.
What is the chemical symbol for selenium?
The symbol for selenium is Se.
What is Selenium and what is it composed of?
Selenium is the chemical element of atomic number 34, a gray crystalline nonmetal with semiconducting properties.
What is the composition and structure of selenium?
Selenium is a nonmetal element that belongs to the oxygen group of the periodic table. Its atomic number is 34, and it has multiple allotropes with different physical and chemical properties. Selenium exists in various forms, including elemental selenium, selenide ions, selenite ions, and selenate ions.
Does chemical and physical properties are probably the same?
No. Chemical and physical properties are different.
When do the physical and chemical properties change?
Physical and chemical properties change as the result of a chemical change, which produces new products with different physical and chemical properties than the reactants.
Is selenium a heterogeneous mixture?
no. it is an element and will be homogeneous
Difference between chemical and physical change?
A chemical change is when the chemical properties of a substance changes and a physical change is when the chemical properties stay the same but the physical properties (shape, temperature etc...)
What elements with similar properties as selenium?
Oxygen, Sulphur, Selenium, Tellurium, Polonium, and Livermorium. Have similar chemical properties as they are all in Group VIA (16). However, the last two are radio-active and not found in the open lab.
Does copper have chemical or physical?
Copper has both chemical and physical properties. Chemical properties refer to how copper reacts with other substances, while physical properties refer to characteristics like its color, density, and conductivity.
Is sour milk a chemical properties or a physical properties?
Chemical property
Are fertilizers physical or chemical properties?
chemical
What happens to the chemical and physical properties of a substance formed in a chemical reaction?
The chemical properties of a substance change during a chemical reaction, meaning the substance undergoes a chemical change and forms new substances with different properties. The physical properties may also change, such as color, texture, or state of matter.
Is a property of matter chemical or physical?
Matter has chemical properties (ex.: chemical reactivity) or physical properties (ex.: thermal conductivity).
