REVIEW J.U1L3-Molecules And Extended Structures Question Preview (ID: 58709)
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Which of these substances is a COMPOUND?
a) ammonia (NH3)
b) uranium (U)
c) chlorine (Cl)
d) carbon (C)
Why are salt grains (sodium chloride, NaCl) cubical?
a) A molecule of NaCl contains eight atoms, each at one of the corners of a cube.
b) All extended structure compounds form cubes.
c) In the extended structure of NaCl, atoms are arranged in a CUBICAL PATTERN.
d) Sodium and chlorine atoms both have cubical shapes.
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 carbon (C).
b) They are different from the properties of carbon, oxygen, and hydrogen.
c) They are exactly like the properties of oxygen (O).
d) They are exactly like the properties of hydrogen (H).
How many different types of atoms make up one molecule of methanol? (look up an image)
a) 6
b) 5
c) 4
d) 3
Material X shows tightly-packed PERFECT REPEATING rows of atoms. Material Y is more random. What CLAIM is most likely correct?
a) X is a CRYSTAL, and Y is made of separate molecules.
b) X is a metal, and Y is a salt.
c) X is an element, and Y is a compound.
d) X is made of single atoms, and Y is made of molecules.
Reactant A and reactant B react together to form combined-product C. What type of substance is product C?
a) an atom
b) a mixture
c) a compound
d) an element
A SINGLE element or compound with its own chemical properties is --
a) a pure substance
b) gravel
c) a mixture of salt and sugar
d) your computer
The attractive force that holds atoms together =
a) neutrons
b) glue
c) gravity
d) chemical bonds
Pure substances are made up of only one type of matter throughout. They are not mixtures.
a) TRUE
b) FALSE
c) distractor: salt plus sugar
d) distractor: horses run on the beach
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) FALSE
c) distractor: water is fun to swim in
d) distractor: oxygen is necessary for human respiration
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