Unit 2 Vocab Callie Copeland

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Across
  1. 2. A particle of electromagnetic radiation has no mass and carries a quantum of energy.
  2. 3. A unit of mass that describes the mass of an atom or molecule
  3. 6. A horizontal row of elements in the periodic table
  4. 7. A subatomic particle with a negative charge
  5. 8. only certain values that are allowed
  6. 9. A subatomic particle that has a positive charge and is found in the nucleus
  7. 11. is the lowest energy state of a quantized system (100)
  8. 13. a state in which an atom has more energy than it does at its ground state
  9. 16. The energy needed to remove an electron from a negative ion to form a neutral atom or molecule
  10. 17. a positively charged ion
  11. 18. each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
  12. 20. each of the actual or potential patterns of electron density that may be formed in an atom or molecule by one or more electrons and that can be represented as a wave function
  13. 21. one-half the distance between the nuclei of two atoms of the same element when the atoms are joined
Down
  1. 1. The amount of energy required to remove an electron from an atom
  2. 4. The reduction of the attractive force between a nucleus and its outer electrons due to the blocking effect of inner electrons
  3. 5. Measures the tendency of an atom to attract a shared pair of electrons
  4. 6. likelihood that a particular event will happen
  5. 10. area around the nucleus of an atom where the atom's electrons are most likely to be found
  6. 12. A particle in the nucleus with no electrical charge
  7. 14. An atom or group of atoms that has a positive or negative charge
  8. 15. a negatively charged ion
  9. 19. Vertical column in the periodic table