It would be a compound. An element's symbol never has more than three letters and never has more than one uppercase letter. Note, though that no compound with this formula exists. You must remember your subscripts. The correct formula is CaMg(CO3)2, the formula for the mineral dolomite.
Pb is a compound.
Ag is the chemical symbol for silver, which is an element. It is not a compound.
HI is a compound. The Compound name is Hydrogen Iodide.
A single displacement reaction is a type of chemical reaction where a free element replaces another element in a compound. This occurs when a more reactive element displaces a less reactive element in a compound, forming a new compound and releasing the displaced element.
Gold is a pure element, not a compound, so it is homoatomic.
element. Sulfur dioxide (SO2) is a compound
KCl is a compound not an element.
Beryllium is an element. It is not a compound
cornstarch is a compound element.
it is a compound
Mixture
if it dissolves its a compound if not its an element.
NO = Nitrous Oxide - compound No = Nobelium - element
It is a compound Carbon is an element.
salt is a compound. it is not an element
No, energy is NOT an element, a compound or a mixture.
H is an element and S is an element, but the two together is a compound.