Science - atomic structure

• What do chemists use to represent elements and compounds?

  Symbols and formulae
• What do word equations and balanced chemical equations represent?

  Changes in chemical reactions
• What are the methods to separate mixtures?

  • Filtration
  • Crystallisation
  • Simple distillation
  • Fractional distillation
  • Chromatography
• What determines the method chosen to separate a mixture?

  The type of mixture
• What do atoms consist of?

  Nucleus, protons, neutrons, and electrons
• How can the numbers of subatomic particles in an atom be calculated?

  From its atomic number and mass number
• Who made an early periodic table?

  Mendeleev
• How are elements arranged in the modern periodic table?

  By atomic number in periods and groups
• What do electronic structures model?

  How electrons are arranged in atoms
• What do elements in the same group of the periodic table show?

  Trends in physical properties
• Why do elements in the same group have similar chemical properties?

  They have the same number of outer shell electrons
• What types of questions can be expected in the exam on atomic structure and the periodic table?

  • Multiple choice
  • Structured questions
  • Mathematical questions
  • Practical questions
• How can understanding exam questions help students?

  It boosts exam performance
• What is the purpose of the Bitesize platform?

  • Study support
  • Learning resources
  • Career guidance
• As you move down a group in the periodic table

  Atomic radius increases
• As you move down a group in the periodic table

  Electronegativity decreases
• Elements in the same group have

  similar chemical properties and the same number of valence electrons