Measurement Atoms & Elements

Bonds & Chemical

StructuresNames & Formulas

100 100 100 100

200 200 200 200

300 300 300 300

------ 400 400 400

Measurement 100

Put the following numbers in scientific notation:

• 40081230

• 0.00200

• 240.3

Measurement 200

A 5000. mg block of an unknown material displaces 0.635 cc of water.

What is the density of this material (in g/mL)?

Measurement 300

A patient’s diet is restricted to 30.0 g of fat per day. If she eats a 0.20 kg burger that is 25% fat by

weight, has she exceeded her fat limit for the day?

Bonds & Chemical Structures 100

How many valence electrons are in sulfur tetrafluoride?

Bonds & Chemical Structures 200

Draw the electron dot structure for hydrazine (N2H4)

Bonds & Chemical Structures 300What is the shape of each of the following molecules?

CH4

SiH3Cl

PF3

H2S

Which of these molecules are polar?

Bonds & Chemical Structures 400

Draw the Lewis dot structure for CH2O.

Draw the Lewis dot structure for CH3CO2-.

Hint: both oxygen atoms are attached to ONE of the carbon atoms

Do either of these exhibit resonance?

Names & Formula 100Name the following compounds

• LiBr

• Ca3N2

• Cu2S

(Hint: one of these has multiple valencies!)

Names & Formula 200

Name the following compounds:

• PCl3

• N2O5

Names & Formulas 300

Which of the following contains an ion with a 3+ charge?

KCl

Na2O

FeCl3

Mg(NO3)2

Names & Formula 400

Name the following compound: (NH4)2SO4

...and…

Write the formula for magnesium phosphate

Atoms & Elements 100

Describe the structure of an atom and the three types of subatomic particles

Atoms & Elements 200

Write the atomic symbols for the elements described below:

• An atom with 15 protons and 16 neutrons• A neutral atom with 17 electrons and 20 neutrons

Atoms & Elements 300What neutral atoms are described by the

following electron configurations?

• 1s22s22p63s23p64s23d104p6

• [Ar] 4s23d104p3

• 1s22s22p63s23p64s23d5

Atoms & Elements 400Consider F and Na.

Which is more metallic?

Which has a larger atomic radius?

Which has a higher ionization energy?

Which is more electronegative?