Name:
14e96
KtrY
+ = (rctttxs1
Period:
Date:
rlect*fe{T!
Radioactivity Worksheet
following nuclei:
;x
a
b.
t?C
';;L:
r
: b
A*
i".r.t-.rrA vrt,cFrun
!
pya,lan",
c. )!re
i!re : JG
-.lq
d#,ryrialF = d. 'll,lu :
P
tt
vo na>
=
2.
e\eg*r,r:ts,( n*r.fr^
The three types of radioactive emissions are called alpha (cr), beta (B) and gamma (y)
radiation. Complete the table below v',ith the correct information about each type.
Atomic Symbol
Can Be Stopped By
\['r,", I pc"pu''
t\nr cKy?.otc\O
3.
icg(.
(
*C{t*s,
Which of the three radioactive emissions (c, F, y ) best fit the following statements? Write the
correct symbol/s on the lines.
a) These emissions are charged. D\, 0
b) This emission is the most massive (heaviest). q
.\
ot''
o
c^'nro:
(+Z ,s h6&*s{
c) This emission is the most charged.
d) This emission is most dangerous outside of the body. fn n or+ dr"^W^''-t ct'U,{-t$tg"l
e) This emission is stopped by thin paper or a few centimeters of air. cx
/',
0 This emission can travel through paper, but is stopped by aluminum. rt
g) This emission can travel through fairly thick lead.
4.
Which type of radiation - alpha, beta, or gamma:
a. Results in the greatest change in atomic number? Why?
C(
g(.ct,t\Q it
8.Cx\{
b.
Results in the least change in atomic number?
c.
Produces the greatest chahge in mass number? Why?
c{
ra{rf\d.\ bq
Produces the least chanse in mass number? Whv?
A ,,{Y
}po-ffr pl.O
no'{ Ci^ar.
.-{
5.
Complete the following nuclear reactions:
a.
'i!no
>
fu*
b. 'tlpo )'llru
i'
+-$tl|e
c. 'iiu >}HU + iue
d.
"roon
>'llro + 3e-
.. lila+ 'lu >'lo
6.
lu
,
ue{'t .e'g\i
std{.
When isotope bismuth-2l3 -emrts an alpha+adicle:
a. Write out the nuclear equation:
'"f"
a; -t j +ti
b. Which is the parent
i
'TrT
I
element? 3l s m.r-*h * f, \ 3
-trrtl\iWn r - lOl
c.
Which is the daughter element2
d.
What new element results if the isotope, instead, emits abetaparticle? (rewrite equation)
'F*
7.
+
Bi -l
3,
e r
tF.*
Po
';;f o emits
)n 2j,tPo
emlts a beTa'-dafticle,
beta parficle, lt
it tranSforms into a new element.
When
a.
5*?; -; e.o ;
Write out the nuclear eouation:
tl
fr)rnp\
b. Fill out the chart below:
Name of the
Element
#of
Atomic
Number
Electrons
Po\onr tte,1
8. In a paper-making
factory, beta radiation is used to check that the paper being produced is the
correct thickness. If the paper gets too thin, the reading on the detector increases causing the rollers
to move apart to make the paper thicker. If the paper gets too thick, the reading on the detector goes
down causing the rollers to move closer together. A diagram of this set-up is shown below:
Explain why beta radiation is used for this and not alpha or galnma.
rollers
Ahh^ radrdron ulo'L\A v\o1' flo thvo*qk
.J
'-ft,.-o
P&tre ,,
1L.,,r1,.r.{r}z(n
*t,__.
{ h"Or^#^ *{,4.n.,
"1fu i-/uL1-^-4-6cw*r",cr- t,co',t\A to
ffi
eketzv'
c*"ete
Mca
rr"\<o
S**
u;he1ea2 ? ]Vas
not WH*'d
b^*
fa-por
.*:+**r,1r,[H"*
B,1.,,".
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