34
Se
Selenium
78.971 u
Selenium
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Cite "Selenium"
Selenium. (n.d.). In Element. Retrieved from /zh-hans/element/se/
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周期
4
族
16
区块
p-区块
相态 (STP)
Solid
Selenium is an essential trace element for humans in small amounts. It is used in glass, electronics, and solar cells.
外观: 红棕色固体
更多非金属
Frequently Asked Questions
What is Selenium?
Selenium (Se) is a chemical element with atomic number 34. It is a solid at standard temperature and pressure, classified as a 非金属.
What are the key properties of Selenium?
Selenium has an atomic mass of 78.971 u, density of 4.809 g/cm³, melting point of 220.9°C, boiling point of 684.9°C.
What is the electron configuration of Selenium?
The electron configuration of Selenium is [Ar] 3d10 4s2 4p4. It is in the p-block of the periodic table.
Who discovered Selenium?
Selenium was discovered by Jons Jacob Berzelius in 1817.
What is the electronegativity of Selenium?
Selenium has an electronegativity of 2.55 on the Pauling scale.