Name: ___________________________________ Period:___ Date:______
Dekalb Reads Assignment: 4.1B
Compounds and Molecules
MODELS OF COMPOUNDS&
HOW DOES STRUCTURE AFFECTS PROPERTIES?
Read pages110-114 and answer the questions
Use your own textbook. Score 3 points.
What kind of model is shown in figure 4-3?
What do the balls (in a stick ball model) represent?
What do the sticks (in a stick ball model) represent?
Are the bonds rigid as stick?
What do structural formulas show?
What is the difference between water’s structural formula and its stick ball model?
What do space filling molecules show?
What is the problem with space filling model?
In what form does Quartz exist?
In what form does table salt exist?
What gives the compounds different properties?
What kind of compounds are strong solids?
What is the chemical formula of quartz?
To how many atoms of oxygen each atom of Silicon is bonded in Quartz?
What is Si-O-Si bond angle?
Why is the melting and boiling points of quartz and sand are very high?
Why does Sodium chloride and similar compounds have high Melting and boiling points?
Compare the attraction between molecules of sugar and boded C, O, H atoms?
Describe the attraction between the gas molecules?
Why do gases take up a lot of space?
Among the molecules of sugar, water and dihydrogen sulfide, which has strongest attrction and which has weakest?
Water has higher melting and boiling point that dihydrogen sulfide. Explain the reason.