Skip to content

Course home

2.1 Atomic structure

2.1 Atomic structure

EasyMediumHard
12345678910
Question 7

An analytical chemist is investigating the isotopic composition of a potassium sample. The two main isotopes detected are represented by the symbols below:

1939Kand1941K {}^{39}_{19}\text{K} \quad \text{and} \quad {}^{41}_{19}\text{K} 1939​Kand1941​K

Describe the complete subatomic structure of a neutral atom of potassium-39 and of a neutral atom of potassium-41.

[3]
Markscheme

2.1 Atomic structure Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Atomic structure

87 exam-style questions on Edexcel GCSE Chemistry 2.1 Atomic structure, covering 2.1.1 Development of the atomic model, 2.1.2 Structure of the atom and subatomic particles, 2.1.3 Mass number, isotopes and relative atomic mass, and 2.1.4 Calculating relative atomic mass from isotopic abundance. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank