Key Idea.
Section 1
The Invisible Glue
Why don't molecules just fly apart instantly? They are held together by molecular attraction. This inherent force acts like a constant magnetic pull, drawing molecules toward one another.
Attraction provides the stability for solids and liquids to exist. Without this force, all matter would simply disperse as gas.
Section 2
Distinct Strengths
Not all substances are "sticky" to the same degree. The strength of molecular attraction is a unique chemical property.
Some substances, like water, have a strong pull, requiring lots of energy to separate. Others, like nitrogen, have a weak pull. This characteristic strength explains why different substances boil or freeze at different temperatures.
Expand to review the lesson summary and core properties.
Section 1
The Invisible Glue
Why don't molecules just fly apart instantly? They are held together by molecular attraction. This inherent force acts like a constant magnetic pull, drawing molecules toward one another.
Attraction provides the stability for solids and liquids to exist. Without this force, all matter would simply disperse as gas.
Section 2
Distinct Strengths
Not all substances are "sticky" to the same degree. The strength of molecular attraction is a unique chemical property.
Some substances, like water, have a strong pull, requiring lots of energy to separate. Others, like nitrogen, have a weak pull. This characteristic strength explains why different substances boil or freeze at different temperatures.