Matter, Trends & Bonding

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Across
  1. 2. Will melt at a single temp
  2. 7. electrons travelled in specific orbital's around the nucleus.
  3. 8. Each version of a sub shell can't hold more than 2 Electrons
  4. 10. An average of the masses of all elements isotopes
  5. 11. a measure of an atoms ability to attract electrons
  6. 13. Arranged the elements according to their atomic mass and valence electrons.
  7. 14. the distance from the centre of the atom to the outermost orbital.
  8. 16. Arranged the elements in order of atomic mass.
Down
  1. 1. An American Physicist determined the exact charge of an electron.
  2. 3. Greek philosopher who proposed that matter was made up of small particles.
  3. 4. the energy change that occurs when an atom gains an electron to form a negative ion.
  4. 5. the amount of energy needed to remove an electron from an atom.
  5. 6. All matter is composed of tiny, indivisible particles called atoms.
  6. 9. Mass of element/mass of compound x100
  7. 12. a region in which electrons can be found
  8. 15. Electrons must exist as pairs.