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atomic weight - protons = neutrons,
Na-23 has an atomic weight of 23 amu, and 11 protons so 23-11=12 neutrons
Justus Rau ∙
23 of them
23 days.
23 cm = 0.23 m
23
23 years = 201,613.7 hours.
23.2=
261
23 000.
Two: 1 and 23
23 of them.
There are 2 tens in 23
92 divided by 4 is 23.
23 ! ! ! !