Which of the following compounds is solid in solution? A BaCro4 B NaNO3 c KNO2 DNacl​

distance, luminosity, brightness, radius, chemical composition, and temperature

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1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.