Quiz 2 Chemla Sprine 2012 Name KEY
Each question is worth 5 points, totaling 40 points for 8 questions.
1.) Write the chemical name or symbol and whether it is a metal, metalloid, or non-metal.
a. w au^a*n' ,W+*l
b. As il&'^;. n4zlallo, J /)
c. cl Ctotori"a n6n wVt-
2.) Fill in the unknown quantities:
Symbol
toc
e3b u
Protons
b
qa
Neutrons
6
746
Electrons
fr Charge
D
+2
3.) Name the following compounds:
a. HBr
b. Co(OH)z
c. NzO
4.) What are the formulae of all the compounds you could make from the following cations and
anions: Na*, Al*3, Br--, g-z NOaD
Na br Al"Os
At Bq
5.) On a different planet, the average isotopic abundances for magnesium are different than on
Earth. 2aMg has 23.98504 amu mass and an abundance of 23.99o/o,2tMg has 24.98584 amu mass
and an abundance of 64.O3%, and 26Mg has 25.98259 amu mass and an abundance of 1'J,.98%.
What is the average atomic mass for magnesium as it occurs on this planet?
0,Ab1q(es ,1tni ) * o,r;-toi(aqnliel) + 0, tfl$(nr,?twn) =
QLl ,61 o-w,^
b. Lead (ll) chloride
c. Silver nitrate
7.) Name one of the scientists discussed in cMpter 2 and what he/she discovered.
(lrhL il*tfu
I
8.) Solve the following equation with the correct number of significant figures.
a. (s2.41s3 +o.oo37et2)/8s031 = 0 " OOI 04qfr
