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