Warm Up: Pg Work silently. Raise hand to ask Ms. Hughes anything. 1.Get a pink packet from the side shelves. These are our warm up’s from now on. 2.Do NOT write the question, only the answer. 3.Do NOT write in the packet. Write on a SEPARATE sheet. Label the warm up with the date. 4.This is GEE practice so you must put an answer for EVERY question even if it’s a guess. Leave NOTHING blank. 5.After time we will go over them. 6.When finished, put the papers in the CORRECT order and put the rubber band back on.

Warm Up- Read the article Write at least 1 sentence about what you think should be done… In this class, I want you to learn the contents of basic chemistry… However, I also want you to be able to understand the importance of chemistry in the environment. There is a chemical, DHMO, that is especially ruining our environment in many ways… and something must be done.

Surprise…. I have some DHMO with me today. Does anyone want to see it??

Announcements Unit 5 test next Friday (3/5) If you have not taken 4 chemistry tests yet this semester, see me after to arrange a make up Retake GLEs for GRADE BOOST 3 WEEKS UNTIL END OF THIRD QUARTER!!!

Mystery Element Fusion of nuclei makes energy of the sun Name means “water” and “creator” Lightweight, very flammable Predominant element in stars

Take 1

All elements WANT to be like the NOBLE GASES. They are the elements’ role models All atoms are NOT created equal

3. Elements will do anything to be like the noble gases. a.Lose electrons b.Gain electrons c.Share electrons

What is a compound? A compound is a pure substance A compound is a combination of two or more different elements that are chemically combined Remember! Electrons do all the work in chemical bonds! Atoms do 3 things with electrons: 1.Give them away 2.Take them 3.Share them

Chemical Formula A chemical formula is a combination of chemical symbols used to represent a compound. A chemical formula contains the number of each atom in the compound.

4 Types of Bonds Metallic Ionic Polar Covalent Nonpolar Covalent What bonds? How do they bond? Why? What results?

How do we know if this is a covalent compound? Is it between a metal and a nonmetal? – Then, it is ionic. Is it between a nonmetal and a nonmetal? – Then, it is covalent!

Naming Ionic Compounds

What do you see? Copy the table into your notes and fill in the question marks with what you think is correct. Formula for Ionic Compound Name for Ionic Compound NaClSodium chloride CaCl 2 Calcium chloride KBrPotassium bromide MgF 2 ??? NaBr???

Naming Ionic Compounds KEY POINT: Rules of naming… 1)Write name of first element (metal). 2)Second element ends in -ide. 3)Ignore subscripts!

Naming Ionic Compounds Draw a mental line between the ions. Na + Cl -

Naming Ionic Compounds Binary Ionic Compound – an ionic compound composed of two elements

Naming Ionic Compounds ZnO

Naming Ionic Compounds KEY POINT: Rules of naming… 1)Write name of first element (metal). 2)Second element ends in -ide. 3)Ignore subscripts!

Naming Ionic Compounds ZnO

Naming Ionic Compounds ZnO Zinc Oxide

Naming Ionic Compounds CaCl 2

Naming Ionic Compounds CaCl 2 Calcium Chloride

Naming Ionic Compounds Al 2 O 3

Naming Ionic Compounds Al 2 O 3 Aluminum Oxide

Naming Ionic Compounds Ternary Ionic Compound – an ionic compound with more than 2 elements

Naming Ionic Compounds Ionic Cheat Sheet!

Naming Ionic Compounds Do not lose this…you will need it the rest of your life (in my class).

Naming Ionic Compounds The way you use it…

Naming Ionic Compounds 1) Look up the ions on the cheat sheet and write their names.

Naming Ionic Compounds BaCO 3

Naming Ionic Compounds BaCO 3 Barium

Naming Ionic Compounds If the first element is +2, where should we find the second? (Remember, charges must balance to zero!)

Naming Ionic Compounds BaCO 3 Barium

Naming Ionic Compounds BaCO 3 Barium Carbonate

Naming Ionic Compounds AlPO 3

Naming Ionic Compounds AlPO 3 Aluminum

Naming Ionic Compounds AlPO 3 Aluminum Phosphite

Naming Ionic Compounds H 3 PO 4

Naming Ionic Compounds H 3 PO 4 Hydrogen

Naming Ionic Compounds H 3 PO 4 Think: H 1+, we have 3 which means +3, where will PO 4 be?

Naming Ionic Compounds H 3 PO 4 Hydrogen Phosphate

Naming Ionic Compounds FeSO 4

Naming Ionic Compounds FeSO 4 Notice Iron appears in +2 and +3…

Naming Ionic Compounds FeSO 4 Sulfate

Naming Ionic Compounds FeSO 4 Since Sulfate is -2, Fe must be +2

Naming Ionic Compounds FeSO 4 Iron(II) Sulfate

Naming Ionic Compounds FeSO 4 Iron(II) Sulfate or Ferrous Sulfate

Practice Time! Finish your “Ionic Compounds- naming and formulas practice” sheet

Naming Covalent Compounds Rule 1: If the first element has more than one atom, give it a prefix.

Naming Covalent Compounds 1 – mono-2 – di- 3 – tri-4 – tetra- 5 – penta-6 – hexa- 7 – hepta-8 – octa- 9 – nona-10 – deca-

Naming Covalent Compounds PCl 3

Naming Covalent Compounds PCl 3 Phosphorous

Naming Covalent Compounds Rule 2: The second element always gets a prefix, uses the root of the word and ends in -ide.

Naming Covalent Compounds PCl 3 Phosphorous

Naming Covalent Compounds PCl 3 Phosphorous Trichloride

Naming Covalent Compounds Rule 3: The “o” or “a” at the end of the prefix is dropped if the element begins in a vowel.

Naming Covalent Compounds N2ON2O

Rule 1: If the first element has more than one atom, give it a prefix.

Naming Covalent Compounds N 2 O Dinitrogen

Naming Covalent Compounds Rule 2: The second element always gets a prefix, uses the root of the word and ends in - ide.

Naming Covalent Compounds N 2 O Dinitrogen Monooxide

Naming Covalent Compounds N 2 O Dinitrogen Monooxide

Naming Covalent Compounds N 2 O Dinitrogen Monoxide

Practice Time! EXAMPLES CCl 4 As 2 O

SO

Sulfur Monoxide

NO 2

Nitrogen Dioxide

N2ON2O

Dinitrogen Monoxide

P2O5P2O5

Diphosphorous Pentoxide

PCl 5

Phosphorous Pentachloride

NF 3

Nitrogen Trifluoride

Writing Formulas from Names EXAMPLES Carbon tetrachloride Diarsenic trioxide Sulfur dioxide Nitrogen trifluoride YOUR TURN TO “FORMULIZE” 1.Sulfur trioxide 2.Carbon monoxide 3.Carbon dioxide 4.Boron trifluoride 5.Tetraphosphorus hexasulfide 6.Xenon difluoride

Independent Practice Time Finish your “covalent compounds- naming and formulas practice” sheet

Done Early? Conferences Make up work Work quietly, be respectful

Sum up What did we learn today? HW: – Unfinished classwork Goal Sheet: are we on track? Top Ten: How’d we do?