The recruitment, selection, employment, and training of apprentices during their apprenticeship shall be without discrimination because of race, color, religion, national origin, or sex. Job Readiness. Applicants must be: 1  physically able to perform the work of the trade.  be prepared to work at extreme heights.
Best Answer: neutrons + protons = 23 ... Sodium Mass Number ... Na Mass Number ... Sodium (Na) Sodium has an atomic number of 11 and a mass of about 23g ... aprox ...
, Scientist. It is the mass of a sodium atom expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the sodium atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.