Unit 4/5 Vocabulary - Ionic & Covalent Compounds

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Across
  1. 3. A central atom is located at the center with four substituents that are located at the corners of a tetrahedron
  2. 7. 3 bonds, 2 lone pairs
  3. 8. A combination of chemical symbols and numbers to represent a substance
  4. 9. 2 bonds, 2 lone pairs
  5. 10. Valence-shell electron-pair repulsion theory; because electron pairs repel, molecules adjust their shapes so that valence electron pairs are as far apart as possible
  6. 11. 2 atoms around the central atom
  7. 16. A positively charged ion
  8. 17. A compound that consists of positive and negative ions
  9. 18. A negatively charged ion
  10. 20. Positive or negative number that indicates how many electrons an atom has gained, lost, or shared to become stable
Down
  1. 1. smallest unit of most compounds
  2. 2. A chemical bond formed when atoms share three pairs of electrons
  3. 4. A chemical bond formed when atoms share two pairs of electrons
  4. 5. a chemical compound formed by the sharing of electrons
  5. 6. A charged group of covalently bonded atoms
  6. 8. the rules used in naming substances
  7. 12. 3 bonds, 0 lone pairs
  8. 13. An atom or group of atoms that has a positive or negative charge.
  9. 14. A number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound
  10. 15. the arrangement of atoms within a molecule
  11. 19. 3 bonds, 1 lone pair