moooooooooooooooleee :)

what is a mole?

THE CHEMICAL MOLE

a unit of measurement containing 6.02 X 12^23


a mole of atoms is

602,000,000,000,000,000,000,000

this week in chemisty we also watched a really cool video that mr.olsen made with mr.washington. it was really creative and taught me a lot about moles.


LISTEN TO THISSSS :)

THE FIRST TEN ALKANES

today we leared the first 10 alkanes.

they are:

CH4------METHANE
C2H6-----ETHANE
C3H8-----PROPANE
C4H10----BUTANE
C5H12----PENTANE
C6H14----HEXANE
C7H16----HEPTANE
C8H18----OCTANE
C9H20-----NONANE
C10H22-----DECANE


the formula for an alkane is ----- CnH2n+2

molecular geometry

today we did a lab on the chemical formulas of elements.

we created 2d structures, 3d structures, named the geometry and their bond angles. we created 3 types of AB2, 2 types of AB3 and a single type of AB4.

we also learned that:
any electron orbital can hold 2 electrons.
a sharedelectron pair is called a covalent bond (nm + nm).
and unshared electon pair s called a lone pair.
vsepr stands for valance shell electron pair repulsion.

attractive molecules :)

In this lesson we observed the response of certain liquids to a charged wand and the behavior of the same liquids as droplets. This activity gave me information about possible interactioon between molecules.

in our groups of four we tested four liquids. the four molecules are water, acetic acid, isopropanol, and kerosene. the three liquids that were attraced to the rod were water acetic acid and isoprotanol. the singalliquid that wasn't attracted was kerosene.

we also did a droplet test. we placed a single droplet of each of the four liquids on a piece of waxed paper. the isoproaol droplet was flat and so was the kerosene droplet. the water and acetic acid sat high on the paper.


-mcflurffy

BALANCING CHEMICAL FORMULAS

today in chem. our class worked in partners and created chemical formulas.each square had represents an ion with a postive charge or a negitive charge.

in total we created 9 different ionic compounds containing one type of cation and one type of anion. each compund was placed together so that the charges canceled and the compound was neutral. Next to each compound we created we wrote the name. first we wrote the cation and then the anion.

to created these 9 compounds we used only 4 molecules. those molecuses included Al for aluminum. Ca for calcium. N for nitride. and finaly Cl for chloride.


-mcfluffy