Today in chem we did a lab titled "Matter Lab Stations", learned about diatomic molecules, and completed a chapter 1&2 review sheet. For the lab, all of the tables had models of molecules and atoms made of different colored balls (pictured below). We went around all 6 tables, and completed a sheet that required us to draw a picture, write a formula, and list all the terms that applied.
The terms we used were;
Atom, Molecule, Pure substance, Mixture, Compound, and element.
Atom, Molecule, Pure substance, Mixture, Compound, and element.
We were told that;
yellow-Hydrogen
black-Carbon
red-we could choose any element, but the majority of the class chose Oxygen.
When we finished Mr. Paek went over it with the whole class.
Diatomic Molecules
After we went over the lab Mr. Paek told us about Diatomic Molecules. The definition we got was: these elements will always be paired when by itself. In other words, when you see one of these elements it will always have a subscript of 2 when it is by itself, i.e. cannot be just one atom, it must be a molecule.
After we went over the lab Mr. Paek told us about Diatomic Molecules. The definition we got was: these elements will always be paired when by itself. In other words, when you see one of these elements it will always have a subscript of 2 when it is by itself, i.e. cannot be just one atom, it must be a molecule.
The diatomic molecules are
H-hydrogen
O-oxygen
N-nitrogen
Cl-chlorine
Br-bromine
I-iodine
F-fluorine
Another way to remember these is by combining them to make a word 'honclbrif' pronounced hohn-cul-brif.
Review
The review sheet included:
The review sheet included:
density
conversion factors
molecules, atoms, compounds, elements
chemical and physical changes
states of matter
metric estimations
All of these will be included on the quiz on Monday, and the test on Thursday. There is a lab quiz on Wednesday also. Dont forget: the web assigns are due on Monday!
