Question 2 Page 52 (Right) - Chapter 4 Class 9 - Structure of Atom

Last updated at April 16, 2024 by

With the help of Table 4.1, find out the mass number of oxygen and sulphur atom

 

Answer

(i) Oxygen atom

 

Number of protons = 8

Number of neutrons = 8

 

Mass number = Number of protons + Number of neutrons 

                        = 8 + 8

                        = 16

Therefore, the mass number of an oxygen atom = 16



(ii) Sulphur atom

 

Number of protons = 16

Number of neutrons = 16

 

Mass number = Number of protons + Number of neutrons 

                        = 16 + 16

                        = 32

Therefore, the mass number of a sulphur atom = 32

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