Answer the following question:
 
Explain atomic number and mass number with examples:
  
i. Atomic number
  
The  in the nucleus of an atom is known as its atomic number.
 
 Example: has  , hence atomic number \(= 18\)
 
ii. Mass number
  
A mass number or atomic mass of an atom is equal to the sum of the  present in the nucleus.
 
Example:
  
If an oxygen atom has \(6\) protons and \(6\) neutrons, mass number of oxygen atom is.
 
For a more detailed solution, refer to the given link: Atomic number and mass number