Based on the trend for atomic radius, list the elements in order from least to greatest atomic radius. (Least at the bottom, greatest at the top). B, C, N, O

Yes she is correct. the answer is completely correct

They make up examples of physical properties 

13 protons and 14 neutrons.  this also means that the amount of electrons also is 13 because electrons have the same amount as protons..the atomic number means the amount of protons (which effectively tells you the electrons) the atomic mass, tells you the amount of protons and neutrons in the nucleus.hope this .