Trends in Periodic Properties

This image shows the trends in periodic properties across the period and down the group.

PeriodicTableTrends.png

Frequently Tested Topics:

  • Definitions of Ionization Potential, Electron Affinity, Electronegativity

  • Trends in Atomic Size, Ionization Potential, Electron Affinity, Electronegativity and Metallic Character across a period and down a group

  • Properties of Alkali Metals (Group 1) and Halogens (Group 17)

*Note that other aspects of the chapter are equally important.

Important Past Questions

  • Which Halogen has the greatest electron affinity? (2008)

  • Give reason: Ionization potential increases across a period. (2012, 2014, 2018)

  • State the period and group of an element based on its atomic number. (2010, 2014, 2017)

Example: Atomic number of an element Z is 16. State the group and period to which Z belongs.

  • State whether an element is metallic or non-metallic based on its atomic number. (2010, 2012, 2014, 2017, 2019)

Example: There are three elements E,F,G with atomic numbers 19, 8, and 17 respectively. Classify the elements as metals and non-metals. 

  • Definitions of Ionization Potential, Electron Affinity, Electronegativity (2009, 2010, 2014, 2016, 2017, 2018, 2019)

  • Out of the given elements, which is the most/least electronegative. (2009, 2013, 2015, 2016, 2019)

Example: The element with the least electronegativity is:  A] Lithium  B] Carbon  C] Boron  D] Fluorine

  • Arrange in increasing/decreasing order of - metallic character/atomic size/ionization energy/electron affinity/electronegativity. (2015, 2017, 2019)

  • If an element has low ionization energy, it is likely to be _________ [metallic/non-metallic] (2008, 2016)