6.P.2.1 Matter

Which choice best describes the smallest particle of the element aluminum that retains all properties of aluminum?

• an atom

• a proton

• a molecule

• an electron

A student has two samples of pure iron. Both samples are malleable and ductile. Why are both samples similarly malleable and ductile?

• They have the same mass.

• They have the same volume.

• They are composed of the same type of atoms.

• They are composed of different types of atoms.

A gold coin is composed entirely of gold atoms. Which statement is true?

• All the atoms are the same element, so each atom will have different properties.

• All the atoms are the same element, so each atom will have the same properties.

• The atoms are likely different elements, so each atom will have similar properties.

• The atoms are likely different elements, so each atom will have different properties.

Which statement is true about the properties of atoms?

• All atoms can be seen without a microscope.

• All atoms are larger than a water molecule.

• All atoms have mass and occupy space.

• All atoms are composed of elements.

Which choice is the most basic building block for all matter?

• an atom

• a liquid

• a mixture

• a compound

What is true of a 5-gram diamond and a 20-gram copper wire?

• Both objects are made of atoms.

• Both objects have the same mass.

• Both objects have identical properties.

• Both objects are in a liquid state at room temperature.

Iron can exist as a solid or a liquid. Which statement best compares solid iron and liquid iron?

• Solid iron and liquid iron have the same type of atoms.

• Solid iron and liquid iron have different types of atoms.

• Solid iron is an element, and liquid iron is a compound.

• Liquid iron is an element, and solid iron is a compound.

Which statement describes the atoms of an element?

• They can be seen with a magnifying glass.

• They have different sizes and shapes.

• They have mass and volume.

• They are weightless.

Which term describes a pure substance that is composed of only one type of atom?

• element

• matter

• mixture

• solution

What is the smallest unit of an element?

• a compound

• a molecule

• an atom

• a cell