Do Now October 31, 2012. Complete the sentence with the correct answer. Write statement!. 1. The formation of precipitate is usually evidence of ? the separation of a mixture a chemical change the formation of a mixture a physical change.
1. What are the two physical properties used to separate mixtures?
physical and chemical change
melting and boiling points
filtration and distillation
compounds and elements
2. What three main groups can elements be divided into?
compounds, elements, and mixtures
metals, elements, and compounds
metals, mixtures, and compounds
metals, nonmetals, and metalloids
3. What is the smallest particle of an element?
4. What are the four classes of matter?
elements, compounds, solutions, and suspensions
elements, compounds, mixtures, and solutions
atoms, molecules, electrons, neutrons
elements, atoms, suspensions and compounds