Download Cloze 5 answers

CHEMISTRY Y12
Production of Materials
CLOZE PASSAGE
No 5 Nuclear Chemistry
Complete the following sentences using appropriate words or short phrases
a) The charge on the nucleus of any atom
Positive
b) Atoms of the same element that contains different numbers of neutrons
Isotope
c) An alpha particle is a ………………………… nucleus and has a charge …………
Helium, 2+
d) Complete the sequence alpha, beta and …………………..rays
Gamma
f) French chemist who discovered accidentally discovered radioactivity
Becquerel
g) The nuclear radiation that is least penetrating
Alpha
h) An ionisation counter used to detect radiation
Geiger counter
i)
An atom of Uranium 238 contains how many neutrons
146
j)
The type of emission when Carbon-14 forms Nitrogen-14
Beta emission
k) A method of measuring the rate of radioactive decay
Half - life
l)
Transmutation
The change of 1 element into another involving a change in nuclear composition
m) The first actinide element that is not naturally occurring
Neptunium
n) The location of Australia’s nuclear reactor
Lucas Heights
o) General name of all the elements from number 93 onwards
Transuranic
p) A radioisotope used in medicine with an atomic number 43
Technetium-99
q)
Found at Royal Prince Alfred Hospital and accelerates charged particles in a circular
motion
Cyclotron
r) Atomic number of the most recently discovered element
118
s) Technitium-99 has a half life of …………….
6 hours
t) Radioactive Strontium-90 is very similar to ……………………… found in bones
Calcium
u) The radiation that everyone is continually exposed to is called …………………radiation Background
v) Radiation can be used to ……………………medical instruments
Sterilise
w) Used to produce neutron rich radioisotopes
Nuclear reactor
x) The charge on a Beta particle
-1
y) Iodine 131 is used to treat and diagnose diseases of the …………………..gland
Thyroid
z) Radioisotopes can be used in medicine and in ……………………..
Industry