Some online tutorials for Periodicity and Bonding and Practice below

Lewis Dot Diagrams

VSPER  

Trends
 

1.  predict the trends in the periodic table (atomic size, ionization energy, electronegativity, ionic size) for a group of elements. That is, order them low to high.

Cd, Zn, Hg                  

As, Sn, F, S, Se

2.  Define the terms electron shielding and nuclear charge and explain the trends in electron shielding and nuclear charge.                                                                                                                                                                                                                                                                                                                       
3.  State the trends in electronegativity, ionization energy, atomic radius.
4.  Explain why cations and anions differ in size from the neutral atoms.
5. 

For the following molecules, draw the Lewis structure, give the molecular shape, polarity, and bond angles. 

	SOCl2	NO (a radical)
Shape:
Polar or non-polar:
	H2O	BeCl2
Shape:
Polar or non-polar:

 

6.Draw the Lewis structures of the following molecules; name the shape of the molecule (not of the electrons) and state whether the molecule is polar or non-polar.

	AlCl3	XeF4	SO2
Shape:
Polar or non-polar:

 

	CH2Cl2	NH3	PF5
Shape:
Polar or non-polar:

 

Answers