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An ionized atom of the magnesium isotope 1225Mg2+^{25}_{12}\text{Mg}^{2+}1225​Mg2+ is detected in a mass spectrometer.

What is the specific charge of this magnesium ion?

Use the following values:

  • mass of a nucleon = 1.67 × 10-27 kg
  • elementary charge e=1.60×10−19 Ce = 1.60 \times 10^{-19}\text{ C}e=1.60×10−19 C

7.7×106 C kg−17.7 \times 10^6\text{ C kg}^{-1}7.7×106 C kg−1

1.6×107 C kg−11.6 \times 10^7\text{ C kg}^{-1}1.6×107 C kg−1

3.8×107 C kg−13.8 \times 10^7\text{ C kg}^{-1}3.8×107 C kg−1

4.6×107 C kg−14.6 \times 10^7\text{ C kg}^{-1}4.6×107 C kg−1

Atomic structure Questions

Practise OCR GCSE Chemistry Atomic structure with exam-style questions for Foundation and Higher tier. 97 questions, matched to the OCR GCSE Chemistry (J248) specification and written in Paper 1 and Paper 2 (Foundation Tier) or Paper 3 and Paper 4 (Higher Tier) style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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Atomic structure Questions

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