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REVIEW J.U1L3-Molecules And Extended Structures
Test Description: Quiz prep
Instructions: Answer all questions to get your test result.
1) Which of these substances is a COMPOUND?
A
ammonia (NH3)
B
uranium (U)
C
carbon (C)
D
chlorine (Cl)
2) Why are salt grains (sodium chloride, NaCl) cubical?
A
Sodium and chlorine atoms both have cubical shapes.
B
All extended structure compounds form cubes.
C
A molecule of NaCl contains eight atoms, each at one of the corners of a cube.
D
In the extended structure of NaCl, atoms are arranged in a CUBICAL PATTERN.
3) Sucrose (table sugar) is composed of carbon, oxygen, and hydrogen. Which statement best describes the properties of sucrose?
A
They are exactly like the properties of oxygen (O).
B
They are different from the properties of carbon, oxygen, and hydrogen.
C
They are exactly like the properties of carbon (C).
D
They are exactly like the properties of hydrogen (H).
4) How many different types of atoms make up one molecule of methanol? (look up an image)
A
6
B
4
C
3
D
5
5) Material X shows tightly-packed PERFECT REPEATING rows of atoms. Material Y is more random. What CLAIM is most likely correct?
A
X is an element, and Y is a compound.
B
X is a CRYSTAL, and Y is made of separate molecules.
C
X is made of single atoms, and Y is made of molecules.
D
X is a metal, and Y is a salt.
6) Reactant A and reactant B react together to form combined-product C. What type of substance is product C?
A
a mixture
B
an element
C
a compound
D
an atom
7) A SINGLE element or compound with its own chemical properties is --
A
gravel
B
your computer
C
a mixture of salt and sugar
D
a pure substance
8) The attractive force that holds atoms together =
A
gravity
B
glue
C
chemical bonds
D
neutrons
9) Pure substances are made up of only one type of matter throughout. They are not mixtures.
A
distractor: salt plus sugar
B
distractor: horses run on the beach
C
FALSE
D
TRUE
10) In some molecules, like the oxygen molecule O2, all the atoms are the same type. Therefore, this type of molecule is an ELEMENT. But water H2O is a COMPOUND.
A
TRUE
B
distractor: oxygen is necessary for human respiration
C
FALSE
D
distractor: water is fun to swim in
*select an answer for all questions
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