What does an atom contain in various energy levels?

Answer 1

The question is somewhat unclear, so my answer may be off.

Energy levels in discussion of atomic structure typically refer to the structure of the electron cloud.

Around an atoms nucleus are a series of orbitals in which electrons can be stored - they require greater amounts of stored energy to contain at higher orbitals. As such, each orbital fills from the innermost ring out.

See http://en.wikipedia.org/wiki/Atomic_orbital for the discussion of atomic orbitals on wikipedia. Each orbital refers to a specific energy level.

Answer 2

An atom contains electrons in various energy levels, or orbitals, around the nucleus. The energy levels are quantized and higher energy levels are farther from the nucleus. Each energy level can hold a specific number of electrons based on the rules of quantum mechanics.

Answer 3

An Atom contains electrons in various energy levels. Electrons are usually negative and we can energy levels as orbitals, orbits or shells.

Answer 4

the Energy level is supposed to hold the electrons. (B.T.W., electrons and protons are basically the same thing)