NM-ASR- Physical Science

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Across
  1. 2. a particle that is smaller than an atom in size, or a cluster of such.
  2. 7. the temperature at which a given solid will melt.
  3. 9. electrons in the outermost shell, or energy level, of an atom.
  4. 10. the time taken for the radioactivity of a specified isotope to fall to half its original value.
  5. 11. change in the position of an object.
  6. 12. the complete transfer of valence electron(s) between atoms.
Down
  1. 1. The sum of the atomic masses of all atoms in a molecule
  2. 3. temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapor of the liquid
  3. 4. the mutual sharing of one or more pairs of electrons between two atoms.
  4. 5. Carbon compounds are those whose molecules contain a carbon atom.
  5. 6. Atoms with the same number of protons but different numbers of neutron
  6. 7. is the SI unit of the amount of substance.
  7. 8. a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.