PERIODIC TRENDS IN THE
P E R I O D I C TA B L E
P E R I O D I C T R E N D S I N T H E P E R I O D I C TA B L E
AT O M I C R A D I U S
I
n
c
r
e
a
s
e
s
Decreases
1 2
1
2
3
4
5
6
7
3
4 5 6 7
8 9 10 11 12 13 14 15 16 17 18
P E R I O D I C T R E N D S I N T H E P E R I O D I C TA B L E
I O N I Z AT I O N E N E R G Y
D
e
c
r
e
a
s
e
s
Increases
1 2
1
2
3
4
5
6
7
3
4 5 6 7
8 9 10 11 12 13 14 15 16 17 18
P E R I O D I C T R E N D S I N T H E P E R I O D I C TA B L E
E L E C T R O N E G AT I V I T Y
D
e
c
r
e
a
s
e
s
Increases
1 2
1
2
3
4
5
6
7
3
4 5 6 7
8 9 10 11 12 13 14 15 16 17 18
P E R I O D I C T R E N D S I N T H E P E R I O D I C TA B L E
IONIC RADIUS
• Cations are smaller than the atom they
are formed from.
• Anions are larger than the atom they
are formed from.