Iron is a chemical element, not a compound.
Iron is not a compound, it is a metallic element.
Fe3N2 is ferric nitride, and it is ionic, not covalent.
Ionic
Iron sulphide is an ionic compound. The Iron is in a +2 oxidation state and the sulphur is in a -2 oxidation state.
No, FeO2 is not an ionic compound. It is more likely a covalent compound based on the elements it consists of (iron and oxygen). Iron can form both ionic and covalent compounds, but in the case of FeO2, it is more likely covalent due to the high oxidation state of oxygen.
Iron(III) chloride is an ionic compound.
It is an ionic compound.
The iron (II) sulphide is a chemical compound; no metal or metalloid.
Yes it is an ionic compound because it is form between Fe (iron) and CO3 (carbonate).
No such compound as 'scl6'. If you mean ' SCl6' , then this is sulphur hexachloride. NB Note the use of capital letters. Single letter chemical symbols are ALWAYS a CAPITAL letter. Two letter chemical symbols are ALWAYS written as ; first letter is a CAPITAL letter, and the second letter is lower/small case. Hence sulphur is 'S' NOT 's' Chlorine is ' Cl'. NOT 'cl'. This is to avoid confusion. As agreed internationally, by IUPAC, and as shown in the Periodic Table.
a covalent compound has protons and electrons
Only in the acid (-COOH) and hydroxy (=C-O-H) group the bonds are polar, all others are covalent.