Encircle the letter of the correct
1.Substances that have unique, identifying properties are called
a. mixture
c. pure substances
b. heterogeneous mixtures d. homogeneous mixture
2. Which of the following are the two types of pure substances?
a. elements and mixtures c. homogeneous & heterogeneous
b. elements and compounds
d. compounds and mixtures
3. An element is a pure substance which is composed of only
a. 1 type of atom
c. homogeneous mixtures
b. heterogeneous mixtures d. one type of molecule
4. A compound is a pure substance which is composed of:
a. only one type of atom
b. only one type of element
c. two or more component substances which retain
their own identifying properties.
d more than one type of element
5. Compounds can be decomposed into elements only by:
a. Chemical reactions
c. filtration
b. evaporation
d. Chromatography
6. Compounds have a definite chemical composition identified by:
a. a mole
c. a physical formula
b. a baby formula
d. a chemical formula
7. When matter is composed of two or more component substances which
retain their own identifying properties?
a. The matter is classified as a mixture.
b. The matter is classified as a pure substance.
c. The matter is classified as a molecular compound.
d. The matter is classified as a compound.
8. A mixture can be separated....
a. by oxidation
c. physically
b. by chemical reactions d. by corrosion
Heterogeneous mixtures...
a. have components so small that they cannot be seen with the
naked eye.
b. do not have the components distributed evenly throughout.
c. include solutions
d. have components evenly distributed all the way down to the
particles.
10. Homogeneous mixtures have components
a. that are always elemental pore substances.
b. which are usually large enough to be seen with the naked eye.
c. evenly distributed all the way down to the particles, whether
atoms, molecules or ions.
d. that are not distributed evenly throughout the mixture.
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10
Answers
Answer:
homogeneous mixture
2 b
3 a4 c
5a
6d
7d
8b
9b
10 d
1) D 2) B 3) A 4) C 5) A 6) D 7) A 8) C 9) B 10) C
Explanation:
1) Substance that have unique, identifying properties are called Homogeneous mixture
2) which of the following are the two types of pure substances? Elements and compounds
3) An element is a pure substances which is composed of only 1 type of atom
4) A compound is a pure substances which is composed of two or more component substances which retain own identifying properties.
5) Compounds can be decomposed into elements only by chemical reactions
6) compounds have a definite chemical composition identified by a chemical formula
7)When matter is composed of two or more component substances which retain their own identifying properties - The matter is classified as a mixture.
8) a mixture can be separated by physically
9)Heterogeneous mixtures- do not have the components distributed evenly throughout
10) homogeneous mixtures have components evenly distributed all the way down to the particles, whether atoms, molecules or ions.