rru,2
\ov
on
rnr
so
t
M6n
thi: vaT
r,.f
r-o
pnAlv
trNc
HAT
NHAX
(srl
PHAM)
Thli
gian
lirm
biri:
120
phft
Ngiy
thi:

cAu
I
(1
aD.
Phin
rr?ng

trong
mQt
ngiy.
2.
IJ.bi t<triii
tu.mg
"tU
Aiit cnay
t.ot
g
mQt:ngay
Gie sfr mdi
srp kign
phfln
h4ch
t4o ra
ZOOiVI"V.
CAU
3
(3
iI). X6t
ph:in
rring
phffn
h4ch
sau:
/
,
jn
*

oi
rvr"v.
rir
nnng tliing
vi
ngucri
ta
th6y
sau
3
tAn
phin
r{
beta,-r*cs
tr&
thirnh
ttiing
vi
6cn
tro"a.
vd sau
4 dn
phfln
ri
beta,
ntRb
tr&
thirnh
diing
vi

phrlt
ra
th6m
do
cric
chu6i
ph6n
ri
beta
thfi.,2
sau
khi
nhin
hach.
)
cho
bi6t :
Kh6i
luqng
cfia
23su,
tn,
to'cs,
,rRb,
tooC.,
,tNb
vi electron
lin
'lugt
li

tg
nhi6n
ddri
c6
tlulng
kinh
is,+
^i
sip
xt-ip
trong
tirng
6 vu6ng
c6
cgnh
1-,52
dm
vi
nhring
chim
trong
mQt
thirng
hinh vi6n
trg
chrfra
nu6c
cd
ti
sii chidu

cfra
virng
ho?t:
b6n
kfnh R
li
bao
nhi6u
m
vi
chi6u
cao
H Ii
bao nhi6u
m6t
2.
Sii thanh
nhi6n
li_6u
n ldr
bao
nhi6u
thanh.
3. The
tich nhi6n
tiQu
V lir
bao
"fri6r
ilt f.frai.