Unit 6 Review Practice

Match the following compounds with their correct number of total valence electrons.

• 24

• CO₂

• 40

• NO₃^-

• 16

• NBr₃

• 26

• PI₅

• 32

• CF₄

Place the following metals in order from LEAST reactive to MOST reactive.

• Strontium

• Sodium

• Rubidium

• Cesium

• Calcium

Answer explanation

Be sure to sort by group first and then period. Metals in column 1 are more reactive than metals in column 2. Then metals become more reactive as you move down the table.

Place the following elements in order from smallest to largest based on atomic radius.

• Iodine

• Bromine

• Nitrogen

• Selenium

• Sulfur

Answer explanation

Be sure to sort by group first and then period. Metals in column 1 are more reactive than metals in column 2. Then metals become more reactive as you move down the table.

Place the following nonmetals in order from LEAST reactive to MOST reactive.

• Sulfur

• Oxygen

• Argon

• Fluorine

• Chlorine

Answer explanation

Be sure to sort by group first and then period. Nonmetals in column 17 are more reactive than nonmetals in column 16. Then nonmetals become more reactive as you move up the table. Finally noble gases have no reactivity.

Match each image with the number of electrons pictured.

• 4

• 
• 6

• 
• 8

• 
• 2

• 

Label the families of the periodic table.

j

d

b

g

h

Alkali metals

Common Gases

Noble Gases

Chalcogens

Acidic Metals

Transition Metals

Stationary Metals

Alkaline Earth Metals

Pnictogens

Halogens

What is the Molecular Geometry of the molecule?

• Linear

• Trigonal Pyramidal

• Bent

• Trigonal Planar

• tetrahedral

What is the Molecular Geometry of the molecule?

• Linear
• Bent, 120^o
• Bent, 109.5^o
• Trigonal Planar

What is the molecular geometry of the image? (The purple p shaped orbitals represent the lone pairs)

• Octahedral

• Square Planar

• See Saw

• Trigonal Bipyramidal

• Tetrahedral

What shape would PH₃ have?

• Trigonal Planar

• Trigonal pyramidal

• Bent

• Linear