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Presentation on theme: "The really happy man is the one who can enjoy the scenery even when he has to take a detour."— Presentation transcript:

1 The really happy man is the one who can enjoy the scenery even when he has to take a detour.

2

3 Helium or Helon? When Helium was first discovered it was named after the sun using the Greek word Helios. It was given the ending “ium” which is characteristic of metals, because it was first believed to be an Alkaline Earth Metal. Later people tried to rename it, but alas to late the name Helium stuck.

4 Lesson 4

5 METALS vs. Non- METALS

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7 Molecular compounds Atoms held together by covalent bonds. Involves nonmetals. CF 4 Carbon Tetrafluoride

8 Molecule Uncharged group of two or more atoms held together by covalent bonds.

9 Covalent Bonds Involves nonmetals. Chemical bond formed between two atoms by sharing a pair of electrons.

10 Covalent Cont. Liquid or gas at room temperature due to weaker interparticle forces between molecules. Not soluble in water. Interparticle forces- force between particles that make up a substance.

11 Naming Molecular Compounds Use prefix to name the number of atoms present.

12 Prefixes Mono - 1 Di -2 Tri - 3

13 Cont. Tetra – 4 Penta – 5 Hexa - 6

14 Cont. Hepta – 7 Octa - 8

15 Cont. Nona – 9 Deca - 10

16 F 2 & Cl 2 (Fluorine & chlorine gas) HF (g) Hydrogen Fluoride HCl (g) Hydrogen Chloride H 2 S Dihydrogen Sulfide HCN – Hydrogen cyanide NO - NO 2 - NO 3 - N 2 O Cl 2 O dichlorine monoxide NH 3 Ammonia PCl 3 Phosphorus trichloride

17 Example #1- Names to Formulas Sulfur trioxide S O 1 3 I’m a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula If no prefix, then 1 is implied and not written

18 Example #2- Names to Formulas dichlorine heptaoxide Cl O 2 7 I’m a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula

19 Example #3- Names to Formulas oxygen difluoride O F 1 2 I’m a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula If no prefix, then 1 is implied and not written

20 Example #4- Names to Formulas dinitrogen tetraoxide N O 2 4 I’m a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula

21 Example #5- Names to Formulas phosphorus pentachloride P Cl 1 5 I’m a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula If no prefix, then 1 is implied and not written

22 Example #6- Names to Formulas di nitrogen monoxide N O 2 1 I’m a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula If no prefix, then 1 is implied and not written

23 Example #7- Names to Formulas carbon monoxide C O 1 1 I’m a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula If no prefix, then 1 is implied and not written

24 Practice Problem #1 ClF 3 Choose the correct name for the compound 1. carbon iodine trifluoride 2. chlorine trifluorine 3. chlorine trifluoride 4. chlorine tetrafluoride 5. none of the above next problem PrefixesElement List

25 Practice Problem #2 arsenic pentabromide Choose the correct formula for the compound 1. AsBr 5 2. ArBr 5 3. AsBr 7 4. As 5 Br 5. none of the above next problem PrefixesElement List

26 Practice Problem #3 N2O3N2O3 Choose the correct name for the compound 1. nitrogen trioxide 2. dinitride trioxide 3. dinitrogen trioxygen 4. dinitrogen trioxide 5. none of the above next problem Prefixes

27 Practice Problem #6 dichlorine monoxide Choose the correct formula for the compound 1. ClO 2. Cl 2 O 3. ClO 2 4. Cl 2 O 2 5. none of the above next problem Prefixes

28 Practice Problem #8 Tetraphosphorus decaoxide Choose the correct formula for the compound 1. P 4 O P 6 O PO P 2 O 5 5. none of the above next problem Prefixes

29 Practice Problem #11 NO Choose the correct name for the compound 1. mononitrogen monoxide 2. nitrogen monoxygen 3. mononitrogen oxide 4. nitride monoxide 5. none of the above next problem This is nitrogen monoxide

30 Practice Problem #16 silicon tetrabromide Choose the correct formula for the compound 1. SBr 4 2. ScBr 4 3. SiB 4 4. SiBr 6 5. none of the above next problem PrefixesElement List The correct formula is SiBr 4

31 Practice Problem #17 S4N4S4N4 Choose the correct name for the compound 1 tetrasulfur tetranitride 2. tetrasulfur nitride 3. trisulfur trinitride 4. tetrasulfur tetranitrogen 5. none of the above next problem Prefixes

32 Practice Problem #19 BF 3 Choose the correct name for the compound 1. monoboron trifluoride 2. boron trifluorine 3. boron trifluoride 4. bromine trifluoride 5. none of the above Element List

33 Practice Problem #20 tetraphosphorus decasulfide Choose the correct formula for the compound 1. P 6 S 9 2. P 4 S 9 3. P 4 Si Ph 4 S none of the above next problem PrefixesElement List The correct formula is P 4 S 10

34 Si As Al Ge Sb Po B Te At H H dual properties


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