2024-2025 Notes On Periodic Trends

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Metallic Characteristics (MC)





1) Down a Column (Group/family)

Trend:

Reason:



2) Across a row/period

Trend:

Reason:






The Periodic Table (PT) is organized so that you can "see" trends for specific physical/chemical properties as you:

a) Go Down a Column (also called Group or Family)

b) Across a row/period (from L to R on PT)

The properties are:

Coulombic Force (CF):

Definition: Attractive force between the positive nucleus and valence electrons (ve-). CF is a function:
a) Energy level of ve- (i.e. distance ve- is to nucleus). Higher energy level, less CF
b) # of ve-, more ve-, greater CF


Atomic Radii/size

1) Down a Column (Group/family)
Trend:
Reason:

2) Across a row/period
Trend:
Reason:


Ionization Energy (IE)

Definition:

1) Down a Column (Group/family)
Trend:
Reason:

2) Across a row/period
Trend:
Reason:

Electronegativity (EN)


1) Down a Column (Group/family)
Trend:
Reason:

2) Across a row/period
Trend:
Reason:


Metallic Characteristics (MC)


1) Down a Column (Group/family)
Trend:
Reason:

2) Across a row/period
Trend:
Reason:


Ionic Radii/size


1)Down a Column (Group/family)
Trend:
Reason:

2a) For Metal, how does Atomic radii (AR) compare to Ionic radii (IR)
Trend:
Reason:


2b) For Non-metal, how does Atomic radii (AR) compare to Ionic radii (IR)
Trend:
Reason:


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