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Week 25 March 3-March 7

Week 25 March 3-March 7. Chemical Bonds. Brainpop - bonds. Brainpop-Chemical Bonds. Types of bonds. Ionic – transfer of e- from one atom to another Covalen t - sharing of e- between atoms nonpolar covalent – equal sharing of e- polar covalent – unequal sharing of e-. Ionic bonds.

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Week 25 March 3-March 7

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  1. Week 25 March 3-March 7

  2. Chemical Bonds

  3. Brainpop- bonds • Brainpop-Chemical Bonds

  4. Types of bonds • Ionic – transfer of e- from one atom to another • Covalent - sharing of e- between atoms • nonpolar covalent – equal sharing of e- • polar covalent – unequal sharing of e-

  5. Ionic bonds • Ionic bonds are strong • Salt: an ionic compound that forms when a metal atom replaces the hydrogen of an acid • Hard/brittle • Liquid/dissolved salts conduct electricity

  6. Ionic bonds • Lattice energy when bonds are formed • High melting point (MP) and boiling point (BP) • Crystal structure

  7. Octet Rule = atoms tend to gain, lose or share electrons so as to have 8 electrons Gain 4 electrons • C would like to • N would like to • O would like to Gain 3 electrons Gain 2 electrons

  8. Learning Check  A. X would be the electron dot formula for 1) Na 2) K 3) Al   B.  X  would be the electron dot formula  1) B 2) N 3) P

  9. 1). Ionic bond– electron from Na is transferred to Cl, this causes a charge imbalance in each atom. The Na becomes(Na+)and the Cl becomes(Cl-), charged particles or ions.

  10. Thursday 3/6/14

  11. Do now 3/4/14 (3rd) • Draw the bonding that takes place between Boron and Phosphorus

  12. Do now 3/4/14 (2nd, 7th) BBr3 • Count atoms • Write how many atoms of each element • Draw Lewis Dot for each element

  13. Do Now 3/5/14 (2nd and 7th) • List what elements each compound has and list how many of each element. • NaCl • MgI2 • Na2O • MgCl2 • AlCl3

  14. Agenda 3/5/14 (2nd) Students reviewed counting atoms Dealt with the concept of students relation the formula for the compound to how many of each Lewis dot structures they should draw. Student were given the example RbCl to draw in class related to example #1

  15. Agenda 3/5/14 (2nd) • Homework • Relating to example #1 draw • FrF • LiF • KCl • CsBr

  16. Do Now 3/5/14 (3rd) Write the Formula for Iron (II) Nitrate Write the name for Cu2S (Cu has a +1 charge)

  17. Learning Objectives Students will be able to identify ions in order to determine whether two elements will form an ionic compound. Students will be able to identify the number of atoms in a compound in order to draw ionic bonding between elements. Students will be able to pick out transition elements/metals in ionic compounds in order to write the names the compound using the proper Roman numerals for the charge.

  18. 3rd

  19. Brainpop- bonds • Brainpop-Chemical Bonds • Take out paper for notes

  20. Brainpop chemical bonding quiz • Find 1 person to work with • Bring periodic table!! • Answer all 10 questions with partner • You will have about 10 minutes

  21. Review Brainpop Quiz • All of you

  22. Vocabulary List What you need • Lined paper • Pen/pencil

  23. Vocabulary List • Fold the left side of your paper into the middle • Fold the left side of your paper into the middle

  24. covalent • Covalent bonds release energy when formed. • Energy is needed to break covalent bonds. • Strength of bonds • Nonpolar and polar (EN values) • Dipoles • Forces (ionic bonds) that hold ions together are very strong and hard to break ---weaker than ionic bonds • Lone pairs • Single bond

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