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.
For every isotope of an element the number of protons in the nucleus is always constant. For example, the number of protons in any atom of hydrogen is 1, and the number of protons in any atom of helium is 2. The number of protons in the nucleus of an atom is called its atomic number (Z), which identifies the atom.or example, the number of protons in any atom of hydrogen is 1, and the number of protons in any atom of helium is 2. The number of protons in the nucleus of an atom is called its atomic number (Z), which identifies the atom.