Matter Class #4
Objective: Particle Diagrams for solids, liquids,
gases, atoms, molecules, compounds, and
mixtures. Then finish up Lab # 5,6, and 7.
Lots of drawing today, get paper, put on thinking hats.
Matter HW #2 due Friday.
A particle diagram shows the idea of chemical substances in a cartoon sort of way.
The diagrams are not realistic in shape, but with some imagination and thinking, you
can understand what they are going to show.
You need to be aware of these vocabulary words to move forward. Think, or ask
now.
SOLID – LIQUID – GAS
ATOM – COMPOUND – MIXTURE – DIATOMIC ELEMENTS
These diagrams will show all seven of these, you need to be able to recognize
them, and draw examples of each of these seven.
Atoms, diatomic elements,
molecules… which are which?
atoms
molecules
diatomic
elements
These might
be CO2
2 kinds of atoms
Maybe
These
might be
NH3
H2, O2, N2,
Cl2, etc.
Particle diagrams show atoms, diatomic elements, or molecules.
They can also show phases, depending upon how the
particles are arranged in the box.
LEFT TO RIGHT: Gas particles don’t touch and “float” in space.
Liquids are at the bottom, but not arranged orderly.
Solid matter has particles in a very orderly pattern, that does not
conform to the shape of the container.
Could this be
Ammonia NH3
Carbon Dioxide CO2
Water H20
Methane CH4
Could this be
Phosphorous pentachloride PCl5
Carbon Monoxide CO
Sulfur trioxide SO3
Butane C2H6
When 4.0 g hydrogen combines rapidly with 32
grams of oxygen in the air to form into wata, how
many grams of this dihydrogen monoxide form?
When 4.0 g hydrogen combines rapidly with 32 grams of
oxygen in the air to form into wata, how many grams of this
dihydrogen monoxide form?
36 grams of
course
4.0 g + 32 g = 36 g
Matter cannot be
created or
destroyed in a
chemical
reaction, or
physical change.
A. Atoms only
B. Atoms and molecules
C. Molecules only
D. Diatomic elements
E. A mixture
F. A compound
Which of these could be in the box?
H2, He, CO2, H2O, CO, CH4
That is an atom, could be
He, or any other single atom.
That is a compound with a 1:1
ratio, maybe CO
This is a diatomic element,
maybe H2
Which of these could be in the box?
H2, He, CO2, H2O, CO, CH4
Read the MATTER BASICS
tonight. Notes due by MONDAY.
Matter HW #2 due on Friday.
Co, Ne, Hg, H2O, Au, and Mg are the substances we will use for these questions:
1. which has the highest boiling point? Cobalt at 3143 K which is 2870 °C
2. Which will expand the most when heated? The gas neon
3. Which can be compressed the most? The gas neon
4. Which are the least likely to be compressed? Cobalt, mercury, water, gold,
and magnesium (gases compress easily)
5. Which will melt in your mouth? Only the water
6. Which will fit into any shape container you place it (at 25°C) neon gas,
or liquid water
7. Which will FILL any container you place it into (at 25°C) The gas neon
How many atoms are in each of these compounds?
H2SO4 7
C6H12O6 18
H3PO4 7
C10H22 32
NaCl 2
CH4 5
KI 2