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.
The atomic number refers to the number of protons in an elements nucleus. Each element has a unique atomic number and is known by that number until it receives an official name. For example, the two new superheavy elements 113 and 115 have 113 and 115 protons, respectively, in their nuclei.