Atoms and Reactions - Part 1, As, Unit 1, Module 1

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

Clues

  • A small group of atoms held together by covalent bonds. (8)
  • Atoms of the same element with different numbers of neutrons. (8)
  • The amount of solute, in mol, dissolved per 1 dm3 of solution. (13)
  • The mass per mole of a substance. The units of molar mass are g mol-1. (5, 4)
  • The number of particles in the nuclues. (4, 6)
  • The number of protons in the nucleus of an atom. (6, 6)
  • THe quantity whose unit is the mole. Chemists use 'amount of substance' as a means of counting atoms. (6, 2, 9)
  • The simplest whole-number ratio of atoms of each element present in a compound. (9, 7)
  • The weighted mean mass of a formula unit compared with one-twelfth of the mass of an atom of carbon-12. (8, 7, 4)
  • The weighted mean mass of an atom of an element compared with one-twelfth of the mass oof an atom of carbon-12 (8, 6, 4)

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