A. The emission spectrum of hydrogen contains a continuum of colors.
B. All matter displays both particle and wavelike characteristics.
C. The lowest possible energy state of a molecule or atom is called its ground state.
D. Diffraction produces both constructive and destructive interference.
E. Niels Bohr developed a quantum model for the hydrogen atom.

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.

c, liquids evaporate, creating a gas