FeO is Iron(II)oxide, archaically , Ferrous oxide.
Do NOT confuse with Fe2O3, which is Iron(III)oxide ; Archaically Ferric oxide.
The 'iron' atom is in different oxidation states for these two compounds.
NB
'Fe' is the chemical symbol for 'Iron', and comes from Latin 'Ferrum' for iron.
ferrous oxide -or- iron(II) oxide
First of all 'FeO' is NOT an element. It is a compound composed of two elements. The elements being iron(Fe) and oxygen(O). Next, you appear to misunderstand between 'Ionic' and 'molecular'. Any substance is a composed of two or more atoms is a molecule. The method of combination of these atoms can be either 'Ionic' or 'covalent'. Iron(II) Oxide (FeO) is an ionic molecule (compound). Fe^(2+)(aq) + O^(2-)(aq) = FeO(s)
Iron Oxide Its actually Iron(ii) Oxide there is no such thing as iron oxide.
The ionic compound name for SCI4 is sulfur tetrachloride.
The name of the ionic compound Cs2S is cesium sulfide.
ferrous oxide -or- iron(II) oxide
First of all 'FeO' is NOT an element. It is a compound composed of two elements. The elements being iron(Fe) and oxygen(O). Next, you appear to misunderstand between 'Ionic' and 'molecular'. Any substance is a composed of two or more atoms is a molecule. The method of combination of these atoms can be either 'Ionic' or 'covalent'. Iron(II) Oxide (FeO) is an ionic molecule (compound). Fe^(2+)(aq) + O^(2-)(aq) = FeO(s)
2 FeO
Iron Oxide Its actually Iron(ii) Oxide there is no such thing as iron oxide.
Agreed with anonymous. However, do NOT confuse with Iron(III)oxide; archaically, ferric oxide. Iron is if two different oxidation states indicated by the Roman Numerals (II) & (III). Iron(III)oxide is also known as ferric oxide,, and is the mineral, ironore, used in Blast furnaces to make iron metal. There is also Fe3O4 (Iron(VI)oxide, known as magnetite. This is the 'lodestone' used by ancient navigators to find 'north'. As a length of it always hung in the North/South direction.
Iron (II) oxide.
The name of the ionic compound Cu3PO3 is copper(I) phosphite.
Sodium bromite is the name of the ionic compound NaBrO2.
The name of the ionic compound Cs2S is cesium sulfide.
The name for the ionic compound MgOH2 is magnesium hydroxide.
The ionic compound name for SCI4 is sulfur tetrachloride.
The name of the ionic compound Li2S is lithium sulfide.