An isotope of element Y\text{Y}Y has a mass number of 37 and contains 20 neutrons in its nucleus.
State the electronic configuration of a neutral atom of element Y\text{Y}Y.
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.