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Unit 6 Lesson 4 Pure Substances And Mixtures - PART 1
Test Description: Distinguishing between pure substances (elements and compounds) and mixtures.
Instructions: Answer all questions to get your test result.
1) the basic building blocks of matter; the smallest unit of an element that maintains the properties of that element
A
elements
B
atoms
C
compound
D
molecule
2) a pure substance made up of one type of atom; a substance that cannot be broken down into simpler materials
A
element
B
molecule
C
compound
D
atoms
3) a particle made up of two or more atoms that are chemically joined; the smallest unit of a compound that keeps all the properties of that compound
A
atoms
B
compound
C
molecule
D
element
4) a substance made up of two or more atoms of different elements that are chemically combined
A
molecule
B
atoms
C
element
D
compound
5) a combination of two or more substances or a variety of elements and compounds that are not chemically combined
A
molecule
B
mixture
C
atoms
D
compound
6) either a single element or a single compound, that has definite chemical and physical properties
A
element
B
atoms
C
pure substance
D
compound
7) Which of the following does not describe a pure substance?
A
They are made up of one type of particle.
B
They cannot be formed or broken down by physical changes.
C
They can be elements, molecules, or compounds.
D
They can be a mixture.
8) What happens when a pure substance undergoes a chemical change?
A
(B) A new substance is formed.
B
(D) Both A and B.
C
(A) The chemical bonds that hold atoms together are broken.
D
(C) A mixture can be formed.
9) How can elements be classified?
A
(C) metaloids
B
(A) metals
C
(B) nonmetals
D
(D) All three~ A, B, and C.
10) How can compounds be classified?
A
(D) All three~ A, B, and C
B
(C) by their role in the body
C
(B) as organic or inorganic
D
(A) by their pH or whether they are acids or bases
*select an answer for all questions
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