課程名稱︰普通化學甲上
課程教師︰林萬寅
開課學院：工學院
開課系所︰化學工程學系
考試日期（年月日）︰2011/10/21
考試時限（分鐘）：約15分鐘
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
Five stable isotopes of zirconium (Z = 40) have the following atomic masses
and
abundances. Answer the following questions.
Isotope % abundance Atomic mass
90Zr ? 89.910
91Zr 11.27 90.906
92Zr 17.17 91.905
94Zr 17.73 93.906
96Zr 2.78 95.908
1. Define the terms: atomic number, mass number, and isotope. 15%
2. What is the abundance of 90Zr? 5%
3. Give the number of protons for 91Zr. 5%
4. Give the number of neutrons for 92Zr. 5%
5. Give the number of electrons for 94Zr. 5%
6. Give the number of protons, neutrons, and electrons for 96Zr3+. 15%
7. Calculate the atomic mass of Zr. 15%
8. The existence of subatomic particles and isotopes indicates that some
postulates in
Dalton’s atomic theory are incorrect. What are they? 20%
9. Draw the mass spectrum for Zr. 15%
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