Mercury (I) Hydroxide Hg OH2 (2 is subscript) Mercury(II) Hydroxide Hg (OH)2
Mg has an oxidation state of +2 & hydroxide has the oxidation state of -1. Formula of Magnesium hydroxide is Mg(OH)2
OH is a hydroxyl radical (as in sodium hydroxide) or the alcohol functional group.
LiOH born from Li+1 (Lithium) and OH-1 (Hydroxide)
HgOH would be called mercury(I) hydroxide or mercurous hydroxide. This is a compound that is not well characterised, in other words it is reported by chemists but (as far as I know) the existence of the solid compound has not been proven- e.g. by x-ray crystallography. Some authors say it only exists in solution. It would contain the diatomic Hg22+ ion and the formula would be written Hg2(OH)2.
The color of mercury(II) hydroxide is tan-brown.
Hydroxide is not a molecule but a polyatomic ion with a -1 charge. it has the formula OH- it is very basic.
Oh & charge is -1
The formula for hydrogen hydroxide is H2O.
The formula for potassium hydroxide is KOH.
Hydroxide is a diatomic anion with chemical formula OH−
Yes, hydroxide has a valency of 1. So sodium hydroxide - NaOH - is a compound with Na having a valency of 1 and hydroxide having a valency of 1. For calcium hydroxide, in which calcium (Ca) has a valency of two (2), the formula is Ca(OH)2.