No
that's the manganate ion more info herehttp://en.wikipedia.org/wiki/Manganate
Magnesium Oxide
No.
No. They are two completely different substances. Magnesium chloride (MgCl2) is a water soluble compound of magnesium and chlorine. Magnesium oxide is a water insoluble compound of magnesium and oxygen.
No, magnesium oxide consists of positive magnesium ions (Mg2+) and negative oxide (O2-) ions. It is a white powder. Magnesium and oxygen are to separate substances. Magnesium consists of neutral magnesium atoms (Mg). It is a silvery metal. Oxygen consists of neutral oxygen molecules (O2) it is a colorless gas.
Magnesium oxide is formed when magnesium metal reacts with oxygen. It is an oxide of magnesium. Magnesium is the metal, and magnesium oxide is the resulting compound formed when magnesium reacts with oxygen.
same thing as oxygen no subscripts needed
Hydrogen gas is released when calcium and water react.
Zinc oxide reacts with metallic magnesium to produce magnesium oxide and metallic zinc.
Potassium manganate = K2MnO4 Potassium permanganate = KMnO4 It is important to quote the oxidation state of the compound. Potassium manganate could easily be potassium manganate (VI) as opposed to potassium manganate (VII) KMnO4 Potassium manganate (VI) K2MnO4 is a dark green compound made by fusing manganese (IV) oxide with potassium hydroxide. It is stable in basic solution In aqueous acidic solution it disproportionates to the manganate (VII) ion and manganese (IV) oxide.
magnesium oxide
Magnesium + copper oxide --> magnesium oxide + copper