Chemistry unit 1

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Across
  1. 3. the ability of an atom to attract electrons towards itself in a covalent bond
  2. 4. an element with s and d-electrons but no p-electrons in its outer shell
  3. 6. the number of protons in the nucleus of an atom
  4. 10. the heat energy required to remove one electron from each of a mole of free gaseous +1 ions of that element
  5. 14. an element with s-electrons only in its outer shell
  6. 16. the amount of substance containing the same number of elementary particles as there are in 12.000 grams of carbon 12
  7. 18. the same molecular formula, but a different functional group
  8. 20. the ratio of the mass of one atom of the isotopic to 1/2 of the mass of one atom of carbon-12
  9. 22. a pair of electrons shared between two atoms
  10. 23. the number of elementary particles that there are in 12.000 grams of carbon-12
  11. 24. an attraction between a cat-ion and a sea of delocalised electrons
  12. 25. the total number of protons and neutrons in the nucleus of an atom
  13. 26. the same molecular formula but a different arrangement of carbon in the chain
  14. 27. atoms with the same atomic number but different mass numbers
Down
  1. 1. the existence of partial positive and negative charges on each end of the bond as a result of the unequal sharing of electrons
  2. 2. the same molecular formula but a different arrangement of of covalent bond
  3. 5. an attraction between oppositely charged ions
  4. 7. the ratio of the average mass of a molecule to 1/2 of the mass of carbon-12
  5. 8. the heat energy required to remove one electron from each of a mole of free gaseous atom of that element
  6. 9. an atom or group of atoms which confer specific physical and chemical properties to the molecule
  7. 11. the simplest whole number ratio in which the atom of each element in a compound are found
  8. 12. an element with p-electrons in its outer shell
  9. 13. the number of atoms of each element n one molecule of the substance
  10. 15. the mass of a substance containing the same number of elementary particles as there are in 12.000 grams of carbon-23
  11. 17. series of compounds with the same functional group in which the molecular formula varies by CH2 from one member to the next
  12. 19. a pair of electrons shared between two atoms, one of which provides both of the electrons
  13. 21. a number of different structures having the same molecular formula