Atomic Basics
Periodic Trends
Covalent Bonds
Lewis Structures
VSEPR Theory and Bond Angles
100
How many valence electrons does carbon have AND how many bonds can it form?
4 and 4
100
What are the trends for atomic radius (size) going top to bottom and left to right on the periodic table?
Increases top to bottom, decreases left to right.
100
What types of elements form covalent bonds?
Nonmetals
100
CH4 (in 3D)
100
Molecular geometry and bond angles in CH4
Tetrahedral, 109.5o
200
How many valence electrons does hydrogen have and how many bonds can it form?
1 and 1
200
What are the trends for electronegativity going top to bottom and left to right on the periodic table?
Decreases top to bottom and increases left to right.
200
Give an example of a nonpolar covalent bond and one of a polar covalent bond.
H-H (nonpolar)
C-O (polar)
200
C3H4 (in 3D)
OR 
200
All molecular geometries and bond angles in C3H4
Allene: Trigonal planar (120o) and linear (180o)
Propyne: Tetrahedral (109.5o) and linear (180o)
300
How many lone pairs of electrons does oxygen have, and how many bonds can it form?
2 and 2
300
Explain WHY carbon has a larger atomic radius than hydrogen.
Carbon has more energy levels, so it's valence electrons are farther from the nucleus, resulting in a larger atomic radius.
300
What type of bond is C-H? Why is it classified this way?
Nonpolar. The difference in electronegativity between C and H is small.
300
Draw the Lewis structure of a 5-membered ring of carbons. Give its chemical formula.
C5H10
300
Draw an organic molecule that includes a bent shape.
(Answers vary)
400
What are the electron configurations of C, N, O, and F?
C: 1s22s22p2
N: 1s22s22p3
O: 1s22s22p4
H: 1s1
400
Which is more electronegative: oxygen or nitrogen? Explain why.
Oxygen is more electronegative. Oxygen has one more proton than nitrogen, so electrons are drawn more strongly towards its nucleus.
400
Draw a molecule with a polar covalent bond and draw any dipoles, labeling the partial positive and partial negative charges.
(See drawings)
400
CH3CONH2 (in 3D, include all lone pairs of electrons)
400
Draw an organic molecule that contains 3 different geometries. Label each with their bond angles.
(Answers vary)