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Sagot :
Answer:
Explanation:
Selenium is a chemical element with the symbol Se and atomic number 34.
...
Selenium
Melting point 494 K (221 °C, 430 °F)
Boiling point 958 K (685 °C, 1265 °F)
Density (near r.t. ) gray: 4.81 g/cm3 alpha: 4.39 g/cm3 vitreous: 4.28 g/cm3
when liquid (at m.p. ) 3.99 g/cm3
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