Core Periodicity: Physical Properties
Slide 32 of 35
Practice Questions: Structured
181
190
212
42
45
65
98
Ionic radius / m10−12
99
104
110
117
143
160
186
Atomic radius / m10−12 
Cl
S
P
Si
Al
Mg
Na
Symbol of element
–(c) The ionic radius of aluminium is smaller than its atomic radius.  The ionic radius of phosphorus is greater than its atomic radius.  Explain the large difference in ionic radius between aluminium and phosphorus. [2] 
6. N02/4c. (i) Define the term electronegativity. [1]
7. M02/1. The values of atomic radius and ionic radius for the period 3 elements are given below