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.
0 in the elemental form, +2 and +4 in its compounds
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.
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.
To determine the oxidation number of a transition metal, you can consider its overall charge and the charges of other elements in the compound. You can also use the rules based on the charge of common ligands or coordination numbers in coordination compounds. Remember that transition metals can have variable oxidation states due to their ability to lose different numbers of electrons.