PCA 2 Review Questions

Which of the following describes the differences between solids and liquids?

• Liquids have a definite volume and shape, but solids only have a definite shape.

• Solids have definite volume and shape, but liquids only have a definite volume

• Both have a definite volume, but only liquids have a definite shape

• Both have a definite shape, but only solids have a defi‐ nite volume

A student ran tests on a mystery substance and found that is has a definite volume, high density, and flows easily. Which state of matter is it and why?

• It is a liquid because it has a definite volume and flows easily

• It is a solid because it has a definite volume and flows easily

• . It is a liquid because it has a definite volume and high density

• It is a solid because it has a definite volume and high density

Which of the following correctly describes the motion of particles in a              solid?

• They do not move at all.

• They move rapidly around in random patterns

• They vibrate in a set pattern.

• They flow easily, but slowly around each other

What is happening to the particles of a gas as it changes phase into a            liquid?

• They slow down and spread apart because energy is being added.

• They slow down and become closer because energy is being removed

• They speed up and spread apart because energy is being added.

• They speed up and become closer because energy is being re‐ moved.

Why do elements in the same families (groups) on the periodic table have the same properties?

• They have the same atomic number and mass number

• They have the same number of electrons.

• They have the same number of valance electrons

• They have very similar mass and atomic numbers.  

 Which of the following pairs share similar properties?

• Bromine (Br) and Iodine (I)

• Oxygen (O) and Iodine (I)

• Fluorine (F) and Neon (Ne)

• Helium (He) and Hydrogen (H)

Which group of elements would be expected to have very similar properties?

• Oxygen, sulfur, selenium

• Nitrogen, oxygen, fluorine

• Sodium, magnesium, potassium

• Neon, sodium, potassium

Where are the metals located on the periodic table?

• On the far right of the periodic table

• On the far left of the periodic table.

• To the right of the metalloids

• To the left of the metalloids

Which of the following are properties of metals?

• Malleable, ductile, and good conductors of heat and elec‐ tricity

• Malleable, dull, and good conductors of heat and electricity

• Ductile, shiny, and poor conductors of heat and electricity

• Ductile, malleable, and poor conductors of heat and electricity

Atomic mass on the periodic table progressively changes left to right and top to bottom because________

• a proton is being lost.

• an electron is being lost.

• a proton is being added

• a proton is being added