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Solutions: Atomic Structure

Q5. A radioactive isotope of carbon is represented by z

(a) Using the same notation, give the isotope of carbon that has two fewer neutrons.

(1 mark)

(b) Calculate the charge on the ion formed when two electrons are removed from an atom of z.

Q = 2e
Q = (2 × 1.6 × 10-19)

Q = 3.2 × 10-19 C

(2 marks)

(c) Calculate the value of the charge to mass ratio for the nucleus of an atom of z.

Q/m = (6 x 1.6 x 10-19)/(14 x 1.67 x 10-27)

Q/m = 4.11 × 107 C kg-1

(2 marks)
(Total 5 marks)