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An element X has a mass number = 37 and it contains 17 protons.

(i) Find the number of neutrons and electrons in the element. 

(ii) Write the electronic configuration of the element.

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The mass number of the element X = 37 

Number of protons = 17 

(i) Number of neutrons = 37 – 17 = 20

Number of the electrons are = 17 

(ii) Electronic configuration is 2, 8, 7

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