Which statement is true about the charges assigned to an electron and a proton? (1) both an electron and a proton are positive.
(2) an electron is positive and a proton is negative.
(3) an electron is negative and a proton is positive.
(4) both an electron and a proton are negative.

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.