Which statement below correctly describes what changes when moving downwards from fluorine to chlorine on the periodic table? A. The classification changes from nonmetal to metal
B. The number of valence electrons increases
OC. The number of total electrons increases
D. The ionic charge of the elements changes from positive to 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.

the answer would be c