Half-Life Equation N(t) = No To find the half-life t/2= t(In2) In(No)- In(N) N(t) quaniky of the substance remairing No inital quamity of fre substance sime elapsed n half ife of the substonce Multiple Choice: choose the best answer 1. Carbon-14 has a half-life of 5,730 years. If a sample contains 70.0 mg originally, how much is left after 17,190 years? а. 3 mg b. 8.75 mg C. 81.9 mg d. 35 mg 2. If 100 g of Au-198 decays to 6.25 g in 10.8 days, what is the half-life of Au-198? a. 5.4 days b. 50. days C. 2.7 days d. 5 days 3. Which of the following is an alpha particle? a. He b. C. H d. oV 1/2
Half-Life Equation N(t) = No To find the half-life t/2= t(In2) In(No)- In(N) N(t) quaniky of the substance remairing No inital quamity of fre substance sime elapsed n half ife of the substonce Multiple Choice: choose the best answer 1. Carbon-14 has a half-life of 5,730 years. If a sample contains 70.0 mg originally, how much is left after 17,190 years? а. 3 mg b. 8.75 mg C. 81.9 mg d. 35 mg 2. If 100 g of Au-198 decays to 6.25 g in 10.8 days, what is the half-life of Au-198? a. 5.4 days b. 50. days C. 2.7 days d. 5 days 3. Which of the following is an alpha particle? a. He b. C. H d. oV 1/2
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:Half-Life Equation
N(t) = No
5. Which of the following is gamma radiation?
a. 42HE
b. 0je
C. 0H
d. oy
To find the half-life
t(In2)
In(No) - In(Ne)
t1/2=
N(e) = quantiky of the substance remairing
No inital quantity of the substance
6. Which radiation has the poorest penetration (meaning it cannot pass through
objects easily)?
=time elapsed
t2 - half fe of the substonce
a. Alpha particles
b. Beta particles
C. Gamma rays
Multiple Choice: choose the best answer
1. Carbon-14 has a half-life of 5,730 years. If a sample contains 70.0 mg originally,
how much is left after 17,190 years?
a. 3 mg
b. 8.75 mg
c. 81.9 mg
d. 35 mg
7. A beta particle is alan:
a. Electron
b. Helium nucleus
C. Proton
d. Hydrogen nucleus
2. If 100 g of Au-198 decays to 6.25 g in 10.8 days, what is the half-life of Au-198?
8. The product of a nuclear decay did not change mass or atomic number. What
type of decay occurred?
a. 5.4 days
b. 50. days
C. 2.7 days
d. 5 days
a. Fusion
b. Alpha decay
C. Gamma decay
d. Beta decay
9. Nuclear power plants use nuclear
bombarded with neutrons, causing an unstable isotope to split into two lighter
to produce electricity, atoms are
3. Which of the following is an alpha particle?
a. 2He
b. e
c. OH
elements.
a. Fission
b. Fusion
C. Combustion
d. oy
10. Atoms that have unstable nuclei and will change into a different atom are said to
4. Which of the following is a beta particle?
be
a. Fluorescent
b. Isotopes
C Radioactive
d. Colorful
a. He
b. 1e
C. H
d. ov
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