2. BELLRINGER EXPLAIN IN COMPLETE SENTENCES THE BASICS OF IONIC BOND STRUCTURE

3. ELEMENT OF THE DAY Calcium Ca ATOMIC NUMBER 20 ATOMIC WEIGHT 40.08 Alkaline metal, reactive ATOMIC STRUCTURE: 20p, 20e, 20n ELECTRONIC STRUCTURE: 2, 8, 8, 2

5. COVALENT BOND bond formed by the sharing of electrons

6. Covalent Bond Between nonmetallic elements of similar electronegativity. Formed by sharing electron pairs Stable non-ionizing particles, they are not conductors at any state Examples; O 2, CO 2, C 2 H 6, H 2 O, SiC

8. Bonds in all the polyatomic ions and diatomics are all covalent bonds

9. when electrons are shared equally NONPOLAR COVALENT BONDS H 2 or Cl 2

10. 2. Covalent bonds- Two atoms share one or more pairs of outer-shell electrons. Oxygen Atom Oxygen Molecule (O 2 ) Oxygen Molecule (O 2 )

11. when electrons are shared but shared unequally POLAR COVALENT BONDS H2OH2O

12. Polar Covalent Bonds: Unevenly matched, but willing to share.

13. - water is a polar molecule because oxygen is more electronegative than hydrogen, and therefore electrons are pulled closer to oxygen.

14. METALLIC BOND bond found in metals; holds metal atoms together very strongly

15. Metallic Bond Formed between atoms of metallic elements Electron cloud around atoms Good conductors at all states, lustrous, very high melting points Examples; Na, Fe, Al, Au, Co

16. Metallic Bonds: Mellow dogs with plenty of bones to go around.

17. Ionic Bond, A Sea of Electrons

18. Metals Form Alloys Metals do not combine with metals. They form Alloys which is a solution of a metal in a metal. Examples are steel, brass, bronze and pewter.

19. Formula Weights Formula weight is the sum of the atomic masses. Example- CO 2 Mass, C + O + O 12.011 + 15.994 + 15.994 43.999

20. Practice Compute the mass of the following compounds round to nearest tenth & state type of bond: NaCl; 23 + 35 = 58; Ionic Bond C 2 H 6 ; 24 + 6 = 30; Covalent Bond Na(CO 3 ) 2 ; 23 + 2(12 + 3x16) = 123; Ionic & Covalent

21. Activities 1.EACH GROUP WORKS ON THE elements GIVEN ON THE BOARD 2.YOU DRAW covalent bond STRUCTURE OF YOUR ELEMENTS IN THE WAY I DID FOR C and O ON THE BOARD 3.AFTER YOU FINISHED, YOUR GROUP LEADER PRESENTS THE RESULT Group 1 - Cl, Cl, 2 - F, F, 3 - O2, 4 - K, I, 5 - I, I, 6 - Si, C, 7 - H2, 8 - H2, O2, 9 - C2, H6, 10 - C, O2

22. Conclusion 1.covalent bonds are formed between nonmetals and nonmetals. 2.Both ions are attracted share the same electrons. 3.Each atom has a tendency to fill outer shell as the noble gas

23. Exit quiz 1.Describe properties of covalent bond. 2.Predict properties of covalent bond using its electronic structure. 3.Evaluate # of electrons in outer orbital of each atom component in covalent bond using atomic numbers and electronic structure of components.