2.  What is an ionic bond?  What was the overall goal of the ionic bond?  What molecules are most likely to form ionic bonds with eachother?

4.  What do you think an covalent bond is?  Can you think of a picture of a covalent molecule?

6. What holds the atoms together? What can form a covalent bond with what? How many covalent bonds can form?

7.  Covalent bond is the bond formed by the sharing of electrons between atoms

9.  H + H ---> H 2 making bonds release energy  H 2 ---> H + H requires energy to break bonds  Molecular compounds have less energy and are ‘more stable’

10.  Electrons attract the positively charged nuclei  They screen the positive charges of the nuclei allowing them to be closer than usual

11.  H 2  F 2  H 2 0  NH 3  CH 4

12.  A covalent bond is the sharing of electrons between atoms  Forming a covalent bond releases energy, breaking a bond takes energy  Molecular compounds are more stable than their singular components  The shared electron screen the nuclei of the atoms, allowing the atoms to be closer together

13.  In covalent bonds, electron sharing usually occurs so that atoms attain the electron configuration of noble gases, or in other words, they share electrons to satisfy the octet rule.

14.  O 2  N 2  CO 2

15.  Bond dissociation energy- the amount of energy required to break a bond

16.  A bond where one atom contributes both bonding electrons Ex. CO

17.  A resonance structure is a structure that occurs when it is possible to draw two or more valid electron dot structures  Ex. 03  The actual bonding is a hybrid or mixture of the resonance structures

18.  PCl 5  SF 6  NO 2

19.  The sharing of electrons isn’t always equal.  Electronegativity is the ability of the atom to attract electrons when the atom is in the compound

22.  Polar bond is a covalent bond where electrons are shared unequally  Nonpolar is a covalent bond where electrons are shared equally  In a polar bond, the more electronegative atom attracts the electron more strongly and gains a slight negative charge  The less electronegative atom has a slight positive charge

23. 0.0 – 0.4 nonpolar covalent 0.4 - 2.0 polar covalent > 2.0 ionic

26.  Weaker than ionic or covalent  Van der Waals Forces  Dipole interactions - between polar molecules  Dispersion forces – motion of electrons  Hydrogen bonds – strong attraction between hydrogen and O, F, N  Because hydrogen is ‘special’  Lack of shielding

27.  Haikus are three line Japanese poems where the first line has five syllables, the second has seven syllables, and the third has five syllables. Write a haiku about how the electrons behave when a covalent compound is formed