Chemistry Definitions

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

Clues

  • A neutron changes to a proton and an electron. The electron is then emitted. (4, 5)
  • A region of space where an electron is likely to be found (7)
  • An amount of substance that contains the smae number of particles as there are atoms in exactly 12g of C-12 (4)
  • Atoms of the same element, with the same number of protons and electrons but different numbers of neutrons (8)
  • Short wavelength, high energy electromagnetic radiation (5, 5)
  • The actual number of atoms of each element present in a molecule/formula unit of a compound (9, 7)
  • The average mass of one formula unit relative to 1/12th the mass of an atom of C-12 (8, 7, 4)
  • The emission of 2 protons and 2 neutrons (a He nucleus) from an unstable nucleus (5, 5)
  • The mass of an atom compared to 1/12th the mass of an atom of C-12 (8, 8, 4)
  • The time taken for half the radioactive nuclei to decay (4, 4)

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