Chemistry 0620 · IGCSE · Atomic structure and the Periodic Table

Atomic structure and the Periodic Table — practice question

An atom belonging to element Q has 19 electrons, 19 protons and 20 neutrons. What is Q?

  • Acalcium
  • Bpotassium
  • Cstrontium
  • Dyttrium

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI