CAMBRIDGE
INTERNATIONAL AS
LEVEL CHEMISTRY
(9701) INORGANIC
CHEMISTRY NOTES
, CHAPTER 10: PERIODICITY
The structure of the Periodic Table:
- Elements are arranged in increasing atomic number which also govern the chemical
properties of an element
o Note: although H has only one valence electron, it is not considered to be a
Group 1 element
Periodic property:
- Patterns/ trends going across a group
- Physical properties:
o Atomic radius
o Ionic radius
o 1st ionization energy
o Electrical conductivity
o Melting point
Periodic patterns of atomic radii:
- Going across the period:
o Nuclear charge increases
o Shielding effect remains constant
o Attraction between nucleus and outer electrons increases
o Atomic radius decreases
Periodic pattern of ionic radii:
, Periodic pattern of 1st ionization energy:
Periodic pattern of electrical condcutivity:
- Melting points:
INTERNATIONAL AS
LEVEL CHEMISTRY
(9701) INORGANIC
CHEMISTRY NOTES
, CHAPTER 10: PERIODICITY
The structure of the Periodic Table:
- Elements are arranged in increasing atomic number which also govern the chemical
properties of an element
o Note: although H has only one valence electron, it is not considered to be a
Group 1 element
Periodic property:
- Patterns/ trends going across a group
- Physical properties:
o Atomic radius
o Ionic radius
o 1st ionization energy
o Electrical conductivity
o Melting point
Periodic patterns of atomic radii:
- Going across the period:
o Nuclear charge increases
o Shielding effect remains constant
o Attraction between nucleus and outer electrons increases
o Atomic radius decreases
Periodic pattern of ionic radii:
, Periodic pattern of 1st ionization energy:
Periodic pattern of electrical condcutivity:
- Melting points:
