60 Unit 1 Alchemy Living By Chemistry Teaching and Classroom Resources Lesson16•Worksheet ©2012W.H.FreemanandCompany/BFW
LBCTCM_01_50a
Old GoldFormation of Elements
Name
Date Period
PurposeTo practice interpreting nuclear equations and to predict the products of specific nuclear reactions.
Part 1: Nuclear EquationsUse a periodic table and the isotope chart from Lesson 14.
1. Fill in this table.
2. Based on the equations, how do you know which nuclear changes are fusion?
3. When an alpha particle is lost from an atom, where on the periodic table would you find the product of the nuclear reaction?
4. Explain how you figured out how many neutrons an isotope has.
5. Fill in the missing parts of these nuclear reactions:
a. ___________ b 1 4020Ca b. ___________ 4
2He 1 22688Ra
c. 3514Si 21
0e2 1 ___________ d. 23892U a 1 ___________
e. 11053I ___________ 1 106
51Sb f. 14056Ba ___________ 1 140
57La
Nuclear equation
change in atomic number
change in number of protons
change in number of neutrons
change in mass number
Type of nuclear change
a 22688Ra 42He 1 222
86Rn alpha decay
b 21484Po 42He 1 210
82Pb
c 178O 1 14
7N 3115P
d 4720Ca 21
0e2 1 4721Sc
e 14864Gd 42He 1 144
62Sm 24
f 84Be 1 42He 126C 12
g 146C 21
0e2 1 147N 11 beta decay
L E S S O N
16cLASSWOrk
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Living By Chemistry Teaching and Classroom Resources Unit 1 Alchemy 61 ©2012W.H.FreemanandCompany/BFW Lesson 16 •Worksheet
6. If a francium atom, element 87, undergoes beta decay, what type of atom will be produced?
Part 2: Making Gold By Radioactive Decay 7. Examine the possibility of making gold atoms by alpha or beta decay as shown in
these two illustrations. Place the appropriate starting isotope in each equation.
Alpha decay:
Beta decay:
8. Referring to question 7, find the two starting isotopes in the equations on the isotope chart. Are they found in nature?
9. Making Sense Why do you think the alchemists were not successful in making gold from other metals?
10. If You Finish Early Write the nuclear equation representing the alpha decay of element 85, astatine.
Au-197 nucleus(stable)
Gamma ray
Alpha particle
LBCTCM_01_050b
Beta particle
Au-197 nucleus(stable)
Gamma ray
LBCTCM_01_050c
_____________ 19779Au 1 a
_____________ 19779Au 1 b
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62 Unit 1 Alchemy Living By Chemistry Teaching and Classroom Resources Lesson16•Transparency ©2012W.H.FreemanandCompany/BFW
Che
mC
atal
yst
1. W
hat
pat
tern
s do
you
not
ice
in t
he f
usi
on r
eact
ion
? 2.
Do
you
th
ink
gold
can
be
crea
ted
on E
arth
by
a fu
sion
rea
ctio
n?
Exp
lain
yo
ur
thin
kin
g.
LBCTCM_01_225
The
mos
t pow
erfu
l sta
rs pr
oduc
e el
emen
ts u
p to
iron,
whic
h ta
kes a
tem
pera
ture
of a
bout
200,
000,
000
o C.
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Living By Chemistry Teaching and Classroom Resources Unit 1 Alchemy 63 ©2012W.H.FreemanandCompany/BFW Lesson 16 • Transparency
Nuclear Chain Reaction
n
n
n
nn
n
n
n
n
nn
n
U-235
U-235
U-235
Ba-141
Ba-141
Ba-141
Ba-141Kr-92
Kr-92
Kr-92
Kr-92
n
U-235
LBCTCM_01_050d
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