Skip to content

Course home

Atomic structure

Atomic structure

EasyMediumHard
1234567
Question 6

During a mass spectrometry analysis of a sample of stardust, a scientist detects a doubly-charged magnesium-25 ion (1225Mg2+^{25}_{12}\text{Mg}^{2+}1225​Mg2+).

What is the specific charge of this ion?

Use the following values:

  • Charge of an electron = -1.60 × 10-19 C
  • Mass of a nucleon = 1.67 × 10-27 kg
  • Neglect the mass of the electrons.
A

4.60×107 C kg−14.60 \times 10^7\text{ C kg}^{-1}4.60×107 C kg−1

B

1.60×107 C kg−11.60 \times 10^7\text{ C kg}^{-1}1.60×107 C kg−1

C

7.66×106 C kg−17.66 \times 10^6\text{ C kg}^{-1}7.66×106 C kg−1

D

3.83×107 C kg−13.83 \times 10^7\text{ C kg}^{-1}3.83×107 C kg−1

Markscheme

Atomic structure Questions

  1. GCSE
  2. /Chemistry
  3. /Atomic structure

77 exam-style questions on OCR GCSE Chemistry Atomic structure. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank