PS1.3 Review

___________ are the smallest unit of an element that maintains the properties of that element.

• atoms

• elements

• compounds

• mixtures

A ______________ is made up of different kinds of atoms chemically combined.

• compound

• element

• molecule

• mixture

True or False: Elements AND compounds are pure substances

• True

• False

A ______________ mixture is one that does not have a uniform composition.

• homogenous

• pure substance

• heterogenous

• solution

A _________________ mixture is one where the substances are evenly spread throughout.

• compound

• heterogenous

• homogenous

• pure

In a ______________, one substance is dissolved in another substance.

• solvent

• suspension

• solution

• molecule

Fruit Loops, pizza, and Skittles are examples of ____________________ mixtures.

• pure

• heterogenous

• compound

• homogenous

Coffee and mouthwash are examples of __________________ mixtures.

• homogenous

• heterogenous

• pure

• compound

Which of these is a pure substance?

• Salt (NaCl)

• Water $H_2O$

• Oxcygen (O)

• Carbon Dioxide $CO_2$

• All of these

Which of these is a mixture?

• Salt (NaCl)

• laundry detergent

• Lithium (Li)

• Flourine (Fl)