Question

The atomic number and the mass number of sodium are 11 and 23 respictively. What information we can convey by this statement.

Answer 1

HEY!!

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⚫The atomic number is the number of protons present in the sodium atom and so the number of protons in sodium are 11.

⚫The number of electrons equal the number of protons in a neutral atom.  

⚫Number of electrons is 11. 

⚫The number of neutrons = Mass number -atomic number = 23-11 = 12.