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

Clues

  • Crude oil is a mixture of... (12)
  • Name the process of adding substances to metals to improve their properties (8)
  • Splitting up long chain hydrocarbons is called ... (8)
  • The ability to make more bonds makes something... (11)
  • These are negatively charged and found on the energy levels of the atom (8)
  • What is CaCO3 (9)
  • What is the large number called on the periodictable of elements (4, 6)
  • What is the number of protons called (6, 6)
  • what is the process of joining small alkene molecules (14)
  • Wht happens when CaCO3 is heated (7, 13)

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