Selenium

Atomic Structure
Symbol	Se
Atomic Number	34
Atomic Mass	78.96 g/mol
Periodic Table
Group	17
Row / Period	4
Element Category	Nonmetal
Picture

Selenium ek chemical element hae jiske chemical symbol Se, atomic number 34 aur mass number 78.96 hae.

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  Black, gray, and red forms of selenium
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  Gallium selenide used in semiconductors
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  Mercury selenide as a mineral
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  Copper selenide as a mineral
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  Sodium selenite in a bottle