Transcript Activity 36 Title: Making Water and Alcohol Molecules What is the difference between an atom, an element, a molecule and a compound? • An.

Activity 36
Title: Making Water and
Alcohol Molecules
What is the difference between an atom,
an element, a molecule and a compound?
• An atom is the smallest particle of an element that
retains the properties of the element
• Elements are the simplest chemical forms of
matter: they cannot be broken down into simpler
substances by chemical processes.
• Molecules consist of two or more atoms that are
held together through covalent or ionic bonds.
• Some elements and all compounds are made of
molecules.
Read C-34
Problem: What are the similarities and
differences between molecules of water and
molecules of alcohol?
Hypothesis/Initial Thoughts:
Review the Molecular Models
• What do the balls represent?
• What do the protruding spikes represent?
• What do the white tube represent?
White
Black
Red
Blue
hydrogen
carbon
oxygen
nitrogen
H
C
O
N
READ
THE
PROCEDURE!
Data/Observation:
Part A
Substance name
Hydrogen
Oxygen
Nitrogen
Chemical Formula
H2
Sketch of Molecular
Model
H
H
Structural Formula
H H
O2
O
O
O
O
N2
N
N
N
N
Part B
Substance name
Water
Methanol
Ethanol
Chemical Formula
Sketch of Molecular
Model
Structural Formula
Formulas
2CH3OH
Subscript represents the number
of that kind of atom in relation to the
other kind of atoms in the
compound
The coefficient represents how many of
that molecule there are
Analysis
• Draw two atoms of hydrogen on the
board. Label the two atoms of hydrogen
with a chemical formula that you think is
appropriate for them alone (when they
are not bonded).
H
H
Possible formulas: H and H, H + H or 2H
NOT H2
Continue with
analysis 4-8