Question

atomic mass of Na is 23 . an atom of sodium is 23 times heavier than 1/12 the mass of C.-12 isotope​

Answer 1

Answer:

means the relative mass of sodium compared with 1/12 the mass of a carbon C-12 isotope . It means it is 23 times heavier than 1/12 th the mass of one C-12 isotope of carbon. Also it says that one atom of sodium has ( 23 - 11 ) = 12 no. of neutrons in its nucleus.

Answer 2

means the relative mass of sodium compared with 1/12 the mass of a carbon C-12 isotope . It means it is 23 times heavier than 1/12 th the mass of one C-12 isotope of carbon. Also it says that one atom of sodium has ( 23 - 11 ) = 12 no