As of 2013, the United States spends about $554.2 billion annually to fund its military forces, and appropriates approximately $88.5 billion to fund Overseas Contingency Operations. Put together, the United States constitutes roughly 39 percent of the world's military expenditures.
the number of protons in the nucleus of an atom of a particular element. In a neutral atom, the atomic number equals the number of electrons. See also atom, electron, proton.
A chemical element's atomic number is the number of positive charges (the number of protons) in the nucleus of each of its atoms. This number is the defining characteristic of a given element, invariant for all atoms of that element.