FeS2 is a compound. It is known as iron pyrite, also called fool's gold, and is made up of iron (Fe) and sulfur (S) atoms bonded together in a specific ratio.
Iron(III) chloride is an ionic compound.
the 2 in FeS2 means there are 2 sodium atoms and one iron atom
The S valence would be -1 when Fe(II) is 2+. In most cases sulfur has one negative and two possible positive valences: -2 and +4 or +6. So FeS2 is not a possible, or maybe a very rare, compound (Iron(II) persulfide?).
To calculate the grams of an element in a compound, you need to find the molar mass of the element and the compound. Then, use the formula: (mass of element/molar mass of compound) x molar mass of element. This will give you the grams of the element in the compound.
No such thing as a 'Compound element'. It is either a 'Compound' or an 'Element. Germanium is an element that appears in the Periodic Table as 'Ge'. NB A compound is a COMBINATION of two or more different elements.
Iron(III) chloride is an ionic compound.
the 2 in FeS2 means there are 2 sodium atoms and one iron atom
The S valence would be -1 when Fe(II) is 2+. In most cases sulfur has one negative and two possible positive valences: -2 and +4 or +6. So FeS2 is not a possible, or maybe a very rare, compound (Iron(II) persulfide?).
element. Sulfur dioxide (SO2) is a compound
KCl is a compound not an element.
cornstarch is a compound element.
Beryllium is an element. It is not a compound
First of all you have mispelled it as 'hellium' . It is 'HELIUM'. It is an element. It atomic No. is '2' , so therefore it is found in position number '2' in the Periodic Table, as 'He'. It is neither a compound nor a mixture. The chemical symbol for helium is 'He '. It's Atomic Mass is '4' It is compsed of 2 protons, 2 neutrons and two electrons. It is the MOST Noble(Inert) of all the elements. It does NOT react with anything. Therefore it exists 'monatomically' (single atoms). Its condensing point is 7 K ( - 266 oC) (Becomes a liquid) Its freezing point is 4 K . ( - 269 oC) (becomes a solid). The name 'helium' is from Classical Greece, and means 'from the Sun'(Helios), because two hydrogen atoms fuse together in the Sun , they form 'Helium'.
Mixture
Iron and Sulfur... the chemical formula is: Iron Disulfide FeS2
if it dissolves its a compound if not its an element.
NO = Nitrous Oxide - compound No = Nobelium - element