Syllabus Edition

First teaching 2014

Last exams 2024

|

Periodic Trends: Chemical (DP IB Chemistry: SL)

Revision Note

Test yourself
Stewart

Author

Stewart

Last updated

Metallic & Non-metallic

  • Periodic trends can also be seen in the typical properties of metals and non-metals which are summarised below:

The typical properties of metals and non-metals

  • The typically properties of metals and non-metals can be explained by reference to their trends in atomic radius, ionic radius, ionisation energy, electron affinity and electronegativity
  • The low ionisation energies and low electronegativities of metals can account for the ability of their valence electrons to move away from the nucleus
    • This is known as 'delocalisation' of the electrons

  • These properties increase from left to right as you transition from metal to metalloid to non-metal
  • The high electronegativity and electron affinity of non-metals can be related to their tendency to share electrons and form covalent bonds, either with themselves or other non-metal elements
  • The similarities in electronegativities of the diagonal band of metalloids which divides the metals from the non-metals explains the behaviour of metalloids

 

Test yourself on the trends in the periodic table:

Worked example

Which increase across a period from left to right?

Answer:

The correct option is D

    • Across a period atomic radius decreases, electronegativity and ionisation energy increase and ionic radius increases then decreases

You've read 0 of your 10 free revision notes

Unlock more, it's free!

Join the 100,000+ Students that ❤️ Save My Exams

the (exam) results speak for themselves:

Did this page help you?

Stewart

Author: Stewart

Expertise: Chemistry Lead

Stewart has been an enthusiastic GCSE, IGCSE, A Level and IB teacher for more than 30 years in the UK as well as overseas, and has also been an examiner for IB and A Level. As a long-standing Head of Science, Stewart brings a wealth of experience to creating Exam Questions and revision materials for Save My Exams. Stewart specialises in Chemistry, but has also taught Physics and Environmental Systems and Societies.