atoms revision

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

Clues

  • ... are not part of the nucleus (9)
  • ... are smaller than atoms (7)
  • atoms are bigger than ... (8)
  • electrons have a ... charge (8)
  • Nucleon is a collective name for two ..., the neutron and proton (9)
  • protons and neutrons are part of the ... (7)
  • protons have a ... charge (8)
  • Subatomic particles are found inside ... (5)

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