[Baykko]

hey guys i have a few chemistry problems im not sure how to do
my teacher hasnt even talked about what is covalent radius so this is just confusing
any help would be appreciated thanks

The covalent radius of an aluminum atom is 1.18 x 10^-8 cm. Assuming that in aluminum foil,the atoms are packed one on top of each other, how many atoms thick is a sheet of aluminum foil? (if aluminum thickness= 0.0017)


A cube of aluminum of side 2.00cm has a mass of 21.60g. Using the covalent radius of an aluminum atom, calculate the volume of the "empty space" inside the cube.



All measurements on a particular laboratory instrument have an uncertainty of 10%. A student carried out and recorded three measurements. A= 1.20 b=0.85 c=0.05 Correct the values and calculate the derived value of I given that I= A-B / B-C

[ARGOS++]

Dear Baykko;

Wikipedia is your friend and can tell you about covalent radius.

Good Luck!
                    ARGOS⁺⁺