1. Molecular Compounds Brittany MacCallum Victoria Banfield Natasha Whalen

2. Molecular Compounds Aluminium bromide Al2Br6 Aluminium chloride Al2Cl6 Ammonia NH3 Decaborane B10H10 Dodecaborane B12H12 Beryllium hydride

3. What are Molecular Compounds? Substances made up of molecules with a molecular weight smaller than 104 Daltons. Have a well defined structure. Examples are ethanol (ethyl alcohol), glucose

4. Expression of the Composition or Structure of a Chemical Compound Formulas for molecules use chemical symbols with subscript numbers to show the number of atoms of each element Ex: O2 for molecular oxygen

5. What is a Molecule? A unit of matter that is the smallest particle of an element. Chemical combination of atoms (as a compound) capable of retaining chemical identity with the substance in mass.

6. Explanation Covalent bonds holds atoms of the same or different non- metal elements together by sharing pairs of electrons. Atoms joined by covalent bonds form molecules. Depending on the number of shared pairs of electrons between two atoms, the covalent bond can be described as a single or a multiple covalent bond. A single covalent bond is when 2 electrons are shared between atoms. A double bond is when 4 electrons are shared and Triple is when 6 electrons are shared.

8. Rules to Name Molecular Compounds 1. The first element in the formula is named first, using the full element name. 2.The second element is named using the suffix -ide. 3. Prefixes are used to see the numbers of atoms present.

9. Prefix and number of atoms Mono- 1 Di- 2 Tri-3 Tetra-4 Penta- 5 Hexa-6 Hepta-7 Octa- 8 Hoha- 9 Deca- 10

10. Examples Compound NONitrogen monoxide N2ONitrogen monoxide NO2Nitrogen monoxide N2O3Dinitrogen trioxide N2O4Dinitrogen tetraoxide

12. Find the Formula for the Following Compounds…

13. Bromine pentafluoride

14. BF5

15. Carbon Dioxide

16. CO2

17. Iodine monochloride

18. ICl

19. Nitrogen dioxide

20. NO2

21. Phosphorus trichloride

22. PCl3

23. Find the Name of the Compound for the Following Formulas…

24. SiCl4

25. Silicon tetrachloride

26. SO2Cl2

27. Sulfuryl Chloride

28. B(CH3)3

29. Trimethylborane

30. N2O4

31. Dinitrogen tetraoxide

32. S2F10

33. Disulfur decafluoride