Radiation and their Uses

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I W U D E O F L M N X M Y T N H D I R A S
B F A I P O H R G R I A W I N J M W G O X
E Y E L E C T R O N J V O P U S M X N S H
F D I N W S I I R V H I T T F N L R X C Q
U S G O O D I O N I S E R S M M A A W J O
E J S C F U S D M S D S P P S C V Y J X W
F Q W T F X C I F O D F W N C Y Y W Y N N
G A M M A A N D B E T A E T Y W Y J A M S
J X W K N J I K J E C O L N Y B Y E A M P
S H N B K X P Q L M F H Q R G E R Q R Y N
V I C S S F V B O G A L U M I N I U M V R
R B B R I W A O F R E A O O M Y Y R L I I
A N O B C T V A E H X U H D A F A X A P V
D C H C S V D G M N S H E A B H W K S S K
O M O N L Q B W I A P G B U P X X V Y W F
N H U P N W Q C C V S N P L Q T C R J K P
G V N I E T W S F E A K A A C V O U P W U
A V C A N C E R W U I D J I H C J E S W M
S Y B Y N U N S K W R F B L K I G M J T K
T T I S M G D H I Y L Q X S M Y D D T E N
R I C D D K U Q H A H J C S U O E C K C N

Clues

  • ----- --- ---- are good tracers (5, 3, 4)
  • 51% of background radiation comes from ----- --- (5, 3)
  • A beta particle is a fast moving -------- (8)
  • Alpha particles are ---- -------- (4, 8)
  • An ----- particle consists of two protons and two electrons (5)
  • Background radioactivity includes the Earth's ----- (5)
  • Beta electrons can be stopped by a sheet of --------- (9)
  • Gamma rays can be used to treat ------ (6)
  • Radioactivity comes from an -------- nucleus (8)

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