U2 Concept 1 Quiz

The result of elements forming chemical bonds is that they (a)   .

• become unstable
• form compounds
• lose electrons
• become gases

Match the following compounds with their bond types.

• NaCl

• Metallic bond

• H₂O

• Ionic bond

• Fe

• Covalent bond

How many atoms of nitrogen are in a molecule of ammonia?

• 2

• 3

• 1

• 4

What does the subscript '3' in NH₃ indicate?

• 3 molecules of ammonia

• 3 atoms of nitrogen

• 3 atoms of hydrogen

• 3 compounds of nitrogen

What is the total number of oxygen atoms in Al₂(SO₄)₃?

• 4

• 8

• 12

• 16

What is the purpose of a chemical formula in chemistry?

• To provide a visual representation of a compound

• To indicate the elements and their quantities in a compound

• To show the physical state of a compound

• To measure the density of a compound

Match the following descriptions to the type of bond.

Occurs between two nonmetals - (a)  

Occurs between a metal and a nonmetal - (b)  

• Covalent bond
• Ionic bond

Their crystal lattice structure is why undissolved ionic compounds are ​hard and ​ (a)   unless at extremely high temperatures.

• solid
• liquid
• gaseous
• a plasma

Which properties are all characteristics of ionic compounds?

• solids with high melting and boiling points

• soft solids which are highly malleable

• when solid, the ions are held in place so the compounds cannot conduct electricity

• conduct electricity when dissolved or molten

Match the following

• Formed between metal and nonmetal

• Ionic Bond

• Formed between two nonmetals

• Line

• 2 electrons not shared by atoms in a covalent compound

• Covalent Bond

• How 2 bonding electrons are shown in a dot diagram

• Lone Pair