PART 1. Multiple choice. Markthe one best answer to each question onthe answer sheet provided.
Questions 1-8 are worth 2 points and questions 9 - 12 are worth 3 points for a total of 28 points.
1. How many km is
(A)'L
...
PART 1. Multiple choice. Markthe one best answer to each question onthe answer sheet provided.
Questions 1-8 are worth 2 points and questions 9 - 12 are worth 3 points for a total of 28 points.
1. How many km is
(A)'L.72x10-4
'j -t ',' -'
,:
17.2 cm?
(B) r.72 x 106
,
(C) 1.72x 10-s
,l | .; x I r," /* I ,!,: yy-\ ;
(D) 1.72 x 103 (E) 1.72x10-e
2. Rutherford and his coworkers discovered the nuclear atom by shooting which of the following at a very
Fn,piece of gold foil?
(9)"1pha particles (B) photons (C) neutrinos
t. I
'rt-.*
"r iG) beta particles ,\^ {'***
(D) protons
3. The two naturally occurring isotopes of boron are 'oB and r1B. Given the average atomic #fS ailr8,
found on the periodic table, what must be the approximate natural abundances of these two isotopes?
(A) 50% toB and 50% rlB t (B):% tog andg7Yo "B , la .!" .,,' 'ricjrN'B and zsy, ttB (Dlo.z '0B and 80% rrB
. :!c.F ,., .
A! ' C r t;.r :i
, -l(1..? t.'t':'-:- tF) 92% loB and 8olo rrB ri
4. How many significant figures 0.000002010g has?
(A) 1 (B) 2 (c) 3 ffi+ (E) 10
5. Which of the following is"pot a mixture? (Alcoffee 1($u1$,3nia
rt,'i
(A) o.oee (B) o 10
.',: {
7. Which of the following is an alkaline eafth metal?
(D) sea water (E) a cookre
(D) 0.0e872
(C) air
(c) o olo
6. What is the correct way to report the answer to the following calculation (done with measured numbers)?
(2189.3-2188.8X2.4+I.3) _
t.t,. ; ,;.'il = S,j
3.900 -x 101
0.1
(A) potassium (B) phosphorus (C) sodium (E) manganese
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