Atomic structureIB MYP Sciences: Mind map

Exam questions on Atomic structure

1. An aluminium atom has atomic number 13 and mass number 27. Aluminium is recycled in large quantities because it can be melted and reused many times.
   Explain why an aluminium atom has no overall electrical charge.2 marks
2. Table salt contains sodium ions. A sodium atom has atomic number 11 and mass number 23. When sodium reacts, each atom forms a sodium ion with a charge of +1.
   Explain how a sodium atom becomes a sodium ion with a charge of +1.2 marks
3. Carbon exists as several isotopes. The three most common are carbon-12, carbon-13 and carbon-14. All three have atomic number 6.
   Describe how atoms of these three isotopes are similar and how they are different, in terms of protons, neutrons and electrons.3 marks