0 in elemental form.
-2 is most common in its compounds (selenides)
It is a gas. Generally it shows -2 oxidation number.
Oxidation number of Se is +6. Oxidation number of O is -2.
It shows some oxidation numbers. Generally it shows +4 oxidation numbers.
The oxidation states of selenium are: -2, +2, +4, +6.
Generally for group 16 elements, like oxygen, sulphur, selenium.
Some of the elements exhibiting variable oxidation numbers are carbon (+4, -4); oxygen and selenium (-2 to +6); nitrogen and phosphorus (-3 to +5) halogens (except fluorine) (-1 to +7) and most of the transition metals and f block elements.
Selenium charge refers to the oxidation states of selenium in its various compounds. Selenium can exhibit multiple oxidation states, commonly ranging from -2 in selenides to +6 in selenates. The most stable and common forms are the -2 state in selenide compounds and the +4 and +6 states in selenite and selenate, respectively. The charge influences selenium's chemical behavior and reactivity in biological and environmental contexts.
0 in the elemental form, +2 and +4 in its compounds
Selenium's most common oxidation state is -2, as it is both a non metal, and is located in the periodic table in the same group as O and S.
Argon is very unreactive as it is a noble gas. Its common oxidation number is zero.
The common name is selenium fluoride. In this molecule, the Se atom is in +2 oxidation state. Therefore the corresponding IUPAC name is Selenium(II) Chloride.
Selenium is a nonmetal that can exhibit both positive and negative oxidation states, but in its most common forms, it typically carries a negative charge. In compounds, selenium often acts as an anion, particularly in the form of selenides (Se²⁻). However, it can also form positive oxidation states, such as +4 and +6 in selenites and selenates, respectively.