Chemistry Quiz

What happens when iron combines with oxygen and water from the air?

• It forms rust and weighs less than the original nail.

• It forms rust and weighs more than the original nail.

• It forms rust and weighs the same as the original nail.

• It is impossible to predict the weight after rust formation.

What is the correct name for the compound with the formula Fe₂O₃?

• Iron trioxide

• Iron(III) oxide

• Iron oxide

• Iron(II) oxide

Which type of elements generally have a tendency to gain electrons in ionic bonds?

• Metals

• Nonmetals

• Noble gases

• Metalloids

What is the chemical formula for ammonium hydroxide?

• NH₄OH

• NH₃(OH)₂

• NH₂OH

• N₂OH

How does a calcium atom become a calcium ion with a 2+ charge?

• It gains 2 protons.

• It loses 2 protons.

• It gains 2 electrons.

• It loses 2 electrons.

What is a covalent bond?

• A bond where electrons are transferred between a metal and nonmetal.

• A bond where electrons are shared between atoms of two nonmetals.

• A bond between atoms where one side of the molecule is always positive and the other side is always negative.

• A bond where electrons are shared between a metal and nonmetal.

What is the correct charge of Cu in Cu₂O?

• 1+

• 1-

• 2+

• 2-

Typically, atoms transfer or share valence electrons to achieve what?

• an exchange of energy

• a neutral charge

• a stable electron configuration

• vaporization

What is the correct name for K₂CO₃?

• potassium tricarbonate

• dipotassium carbon trioxide

• potassium carbonate

• dipotassium carbonate

Ionic compounds are made up of what?

• metals and nonmetals

• metalloids only

• nonmetals only

• a combination of all classes of elements