General Chem Midterm Review

Which of the following is not a mixture?

• Sand and water
• Gatorade
• H₂O
• Gravel

During which phase are the particles of a substance most tightly packed?

• Solid
• Liquid
• Gas

During which phase do the particles of a substance have the most energy?

• Solid
• Liquid
• Gas

During which phase do the particles of a substance take the shape of the container, but do not fill the container?

• Solid
• Liquid
• Gas

Condensation is the phase change from....

• Gas to liquid
• Liquid to gas
• Gas to solid
• Liquid to solid

When heat is removed from a liquid, what phases change could occur?

• Freezing
• Condensation
• Vaporization
• Melting

Atomic number is always equal to...

• The number of protons
• The number of electrons
• The number of neutrons
• The mass number

The atomic number of a neutral atom is equal to...

• The number of protons only
• The number of electrons only
• The number of protons and electrons
• The number of protons + electrons

An electron has....

• no mass, negative charge
• mass and a negative charge
• no mass, positive charge
• mass and a positive charge

The mass of an atom is equal to...

• protons
• neutrons
• protons + neutrons
• protons + neutrons + electrons