Callam Chemistry 251 Autumn 2006

Quiz #1A-1

Quiz #120 points

Name (PRINT)_____________________________I have neither given or received aid on this quiz (SIGN)______________________________TA_______________________________________

Partial Periodic TableI II III IV V VI VII VIII

1 H He2 Li Be B C N O F Ne

Part 1. Periodic Table.a. What element has the electron configuration 1s22s22p3? (3 points)

b. How many valence electrons does oxygen have? (3 points)

c. How many covalent bonds does a neutral oxygen form when bonding in an organic molecule? (3points)

Part 2. Formal Charge. Assign any non-zero formal charges to the atoms in the following Lewisstructures. (3 points each)

CCC

O

NCH

HH

HH H

HH

CCC

H H

HH

Ha) b)

Part 3. Lewis Structures. Draw a valid Lewis structure for a molecule with the following molecularformula. (More than one answer may be possible) (5 points)

CH3ON

Callam Chemistry 251 Autumn 2006

Quiz #1B-1

Quiz #120 points

Name (PRINT)_____________________________I have neither given or received aid on this quiz (SIGN)______________________________TA_______________________________________

Partial Periodic TableI II III IV V VI VII VIII

1 H He2 Li Be B C N O F Ne

Part 1. Periodic Table.a. What element has the electron configuration 1s22s22p2? (3 points)

b. How many valence electrons does boron have? (3 points)

c. How many covalent bonds does a neutral nitrogen form when bonding in an organic molecule?(3 points)

Part 2. Formal Charge. Assign any non-zero formal charges to the atoms in the following Lewisstructures. (3 points each)

C NO

OH

HH

C C O HH

H

HHa) b)

Part 3. Lewis Structures. Draw a valid Lewis structure for a molecule with the following molecularformula. (More than one answer may be possible) (5 points)

(C3H5)+

Callam Chemistry 251 Autumn 2006

Quiz #1C-1

Quiz #120 points

Name (PRINT)_____________________________I have neither given or received aid on this quiz (SIGN)______________________________TA_______________________________________

Partial Periodic TableI II III IV V VI VII VIII

1 H He2 Li Be B C N O F Ne

Part 1. Periodic Table.a. What element has the electron configuration 1s22s22p5? (3 points)

b. How many valence electrons does carbon have? (3 points)

c. How many covalent bonds does a neutral fluorine form when bonding in an organic molecule?(3 points)

Part 2. Formal Charge. Assign any non-zero formal charges to the atoms in the following Lewisstructures. (3 points each)

C C C NH

H

HH H H

O N

C CO

CH H

HH

H

HHa) b)

HH

H

Part 3. Lewis Structures. Draw a valid Lewis structure for a molecule with the following molecularformula. (More than one answer may be possible) (5 points)

(CH4N)+

Callam Chemistry 251 Autumn 2006

Quiz #1D-1

Quiz #120 points

Name (PRINT)_____________________________I have neither given or received aid on this quiz (SIGN)______________________________TA_______________________________________

Partial Periodic TableI II III IV V VI VII VIII

1 H He2 Li Be B C N O F Ne

Part 1. Periodic Table.a. What element has the electron configuration 1s22s22p4? (3 points)

b. How many valence electrons does fluorine have? (3 points)

c. How many covalent bonds does a neutral boron form when bonding in an organic molecule? (3points)

Part 2. Formal Charge. Assign any non-zero formal charges to the atoms in the following Lewisstructures. (3 points each)

H CN

H

HH H

H HCO

H

a) b)

Part 3. Lewis Structures. Draw a valid Lewis structure for a molecule with the following molecularformula. (More than one answer may be possible) (5 points)

C2H5NO