Matter, Trends & Bonding

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