Presentation is loading. Please wait.

Presentation is loading. Please wait.

Physical Science Date :2/16/11 Physical Science Date :2/16/11 Instructional Objective: 1.identify the difference between ionic and covalent compounds 2.Learn.

Similar presentations


Presentation on theme: "Physical Science Date :2/16/11 Physical Science Date :2/16/11 Instructional Objective: 1.identify the difference between ionic and covalent compounds 2.Learn."— Presentation transcript:

1 Physical Science Date :2/16/11 Physical Science Date :2/16/11 Instructional Objective: 1.identify the difference between ionic and covalent compounds 2.Learn about the bonds Review Questions: Name the following Np______Er_______ Other instructions: Lab.Rolling for a compound. Homework: Do Work sheet for naming compound Do Work sheet for naming compound

2 Physical Science 09/29/10 Physical Science 09/29/10 Instructional Objective: 1.Reteach the element’s place in the periodic chart 2.Reteach naming and writing the formula for compounds Review Questions: 1. Explain a cation Other instructions: Lab.Submit the work sheet before you leave Homework: Do the work sheet

3

4 Ions An atom with a charge. It can be positive or negative in charge. It can be obtain by loosing or gaining electrons. (Protons never change)

5 Cations Are always positive in charge. Obtain by loosing electrons. Always going to be a metal Written using the symbol with a + sign Ex. Na + Proton – 11, electron -10 Roman numerals are used to show the charge of certain metals. Ex: Fe 3+ is named as Iron III

6 Anions Are always negative in charge. Obtain by gaining electrons Always going to be a nonmetal Written using a symbol with a negative sign. Ex: Cl – (Proton -17,electron -18)

7 What is an oxidation number? What is an oxidation number? valence electron: electron in the outermost energy level of an atom oxidation number: number of electrons an atom gains, loses, or shares when it forms a chemical bond

8 What is a chemical equation? What is a chemical equation? chemical equation: *chemical formula that describe a chemical reaction coefficient: number that shows how many molecules of a substance are in a chemical reaction Used to balance an equation

9 Ionic Compound Metal and a nonmetal combined. Always a cation and anion Net charge will be zero. Named as metal first,then the nonmetal that ends with ide,ite,ate. Ex. Sodium Chloride (Name) NaCl (Symbol) To write the symbol use the crisscross method to cancel the charges. Ex:

10 Physical Science Date :2/17/11 Physical Science Date :2/17/11 Instructional Objective: 1.understsnd to name compounds that contain polyatomic ions 2.Learn to write the formula for a chemical compounds Review Questions: 1.Three exceptions of polyatomic ions. ______________________________________ _ Other instructions: Finish the Open book pre test Homework: Do Work sheet for polyatomic ions Do Work sheet for polyatomic ions

11 Physical Science Date :2/17/11 Physical Science Date :2/17/11 Instructional Objective: 1.understsnd to name compounds that contain polyatomic ions 2.Learn to write the formula for a chemical compounds Review Questions: 1.Explain cations. ______________________________________ _ Other instructions: Finish the work sheet with the teacher Homework: Do Work sheet for polyatomic ions Do Work sheet for polyatomic ions

12 Physical Science Date 02/21/11 Physical Science Date 02/21/11 Instructional Objective: 1.Learn about the covalent compounds 2.Identify the ionic and covalent bonds Review Questions: 1.Write the formula for sodium phosphide? _______________________________________ Other instructions: 1.Finish the “October Sky” and submit the work sheet 2.Do Work sheet with the teacher Homework: Do the work sheet for the compounds.

13 Metals with multiple ions Many transition metals have more than one oxidation number. It is always indicated with roman Numeral number. Ex: Copper II Copper I Chromium II Chromium III

14 Two types of ionic compounds Binary ionic compound *Contain two elements *Contain a metal and a nonmetal Ex: NaCl

15 Polyatomic ion is a group of atoms that acts as a single atom. have an overall electrical charge. atoms are held together by covalent bonds. If there is more than one polyatomic ion in a molecule, the polyatomic ion is written in parentheses.. End with ite or ate EX: SO 3 2 - Sulfite (one less Oxygen than the ate) (Charge will be same) SO 4 2- Sulfate (Charge will be same)

16 3 Exceptions in the polyatomic ions Ammonium polyatomic cation that not ending with “ite” or “ate” ending NH + 4 - Ammonium NH + 3 -Ammonia Cyanide CN - Hydroxide OH -

17 Ternary Ionic compound Contain a metal and a polyatomic ion Contain three or more elements Or contain a poly atomic cation and a nonmetal Or contain two polyatomic ions. Ex: Na 2 SO 4 ( 3 elements) Ex: Ca(SO 4 ) 2 (more than one polyatomic ions, you must use a parenthesis around it)

18 Covalent Compounds (Molecular compounds) Always going to be nonmetals combined Identify or name using prefix for the number of atoms. Ex:

19 Prefix for covalent compound Mono -1 Di-2 Tri-3 Tetra-4 Penta-5 Hexta-6 Septa-7 Octa-8 Nano-9 Deca-10

20 Physical Science Date :2/16/09 Physical Science Date :2/16/09 Instructional Objective: 1.Learn about the Chemical bond 2.Identify the ionic and covalent bonds Review Questions: 1.An atom’s mass number equals the number of ________________________ Other instructions: Lab. Chemical bonding Homework: Do the work sheet

21 Chemical bonds are the force that join two or more atoms. A stable compound occurs. a net (total) attractive force between the atoms.

22 Two types of bonds Covalent bond: one or more pairs of electrons are shared by two atoms.Covalent bond Ionic bond: one or more electrons from one atom are removed and attached to another atom.Ionic bond resulting in positive and negative ions which attract each other.

23 Covalent Bonds involve the sharing of a pair of valence electrons by two atoms

24 Ionic Bonds one or more atoms lose electrons and other atoms gain

25 Ionization energy The amount of energy used to remove an electron is known as the ionization energy Varies from element to elements Energy increases from left to right(less reactive) Energy decreases from top to bottom(easy to remove the electron, so it will be more reactive) Ex: K is more reactive than Na

26 Crystal Lattices an ionic compound particles are arranged in a repeating pattern The attractions keeps the ions in a fixed position in a frame work (lattice) Ex:LiCl

27 Na 11 Cl 17 CHARGE OF ATOM neutr al (metal) (nonmetal)

28 Na 11 Cl 17 CHARGE OF ATOM neutr al (metal) (nonmetal)

29 Na 11 Cl 17 CHARGE OF ATOM neutr al (metal) (nonmetal)

30 Na 11 Cl 17 CHARGE OF ATOM neutr al (metal) (nonmetal)

31 Na 11 Cl 17 CHARGE OF ATOM neutr al (metal) (nonmetal)

32 [ Na] 1+ 11 [ Cl] 1- 17 CHARGE OF ion positi ve negati ve Ionic Bond (cation)(anion) (metal) (nonmetal)

33 [ Na] 1+ 11 [ Cl] 1- 17 CHARGE OF ion positi ve negati ve Ionic Bond (cation)(anion) (metal) (nonmetal)

34 [ Na] 1+ 11 [ Cl] 1- 17 CHARGE OF ion positi ve negati ve Ionic Bond (cation)(anion) (metal) (nonmetal)

35 [ Na] 1+ 11 [ Cl] 1- 17 CHARGE OF ion positi ve negati ve Ionic Bond (cation)(anion) (metal) (nonmetal)

36 [ Na] 1+ 11 [ Cl] 1- 17 CHARGE OF ion positi ve negati ve Ionic Bond (cation)(anion) (metal) (nonmetal)

37 [ Na] 1+ 11 [ Cl] 1- 17 CHARGE OF ion positi ve negati ve Ionic Bond (cation)(anion) (metal) (nonmetal)

38 [ Na] 1+ 11 [ Cl] 1- 17 CHARGE OF ion positi ve negati ve Ionic Bond (cation)(anion) (metal) (nonmetal)

39 What is a diatomic molecule? is made up of two atoms of the same element is usually held together by a covalent bond. Most gaseous elements form diatomic molecules.

40 7 diatomic molecules 7 diatomic molecules Hydrogen( H 2 ), Oxygen ( O 2 ), Nitrogen (N 2 ), Fluorine (F 2 ), Chlorine(Cl 2 ), Bromine (Br 2 ) Iodine(I 2 )

41 Metallic Bonds Is the attraction between a metal cation and the shared electrons that surround it More valance electrons in a metal-stronger the metallic bond

42 Physical Science Date :2/25/2010 Physical Science Date :2/25/2010 Instructional Objective: 1.Name the ionic and covalent compounds 2. Formula for ionic and covalent compounds Review Questions: write the formula for the following 1.Sodiumphosphate _________________________________ Other instructions: Finish the work sheet (Use the rollercoaster book from under your desk). Homework: Study for the unit test Study for the unit test


Download ppt "Physical Science Date :2/16/11 Physical Science Date :2/16/11 Instructional Objective: 1.identify the difference between ionic and covalent compounds 2.Learn."

Similar presentations


Ads by Google