Matter, Trends & Bonding

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