233132
Frage 1
Frage
How do distinguish one element from another?
Antworten
-
Number of atoms
-
Number of electrons
-
Number of portons
-
All of the above
Frage 2
Frage
Which of these is NOT a homogeneous mixture?
Antworten
-
Solution
-
Suspension
-
Colloid
Frage 3
Frage
A mixture ___ a chemical combining of substances.
Antworten
-
is
-
is not
Frage 4
Frage
In a compound, the ____ are ____ combined.
Antworten
-
atoms, chemically
-
atoms, physically
-
molecules, physically
-
molecules, chemically
Frage 5
Frage
Elements that make up the compound ____ their identities and ____ take on a new set of properties.
Antworten
-
retain, do
-
retain, don't
-
lose, don't
-
lose, do
Frage 6
Frage
The smallest identifiable unit of an element is a(n) ____.
Antworten
-
proton
-
atom
-
molecule
-
None of these
Frage 7
Frage
In a mixture, the substances involved _____ be separated by a simple physical process because the elements are ________.
Antworten
-
can, physically combined
-
can, chemically combined
-
can not, chemically combined
-
can not, physically combined
Frage 8
Frage
In a mixture substances _____ their identities.
Antworten
-
retain
-
lose
Frage 9
Frage
Which of these is not a heterogeneous mixture? (more than one)
Antworten
-
raisin bread
-
dissolved sugar water
-
humans
-
tossed salad
Frage 10
Frage
Which of these is a mixture (others are pure substances)?
Antworten
-
Hydrogen
-
Potassium
-
Neon
-
Sugar
-
An apple
-
Milk
Frage 11
Frage
What is absolute zero?
Antworten
-
coldest possible temerature
-
highest possible temperature
Frage 12
Frage
The measurement with absolute zero is ____.
Antworten
-
Kelvin
-
Fahrenheit
-
Celcius
Frage 13
Frage
The first element was _____ because it has the least amount of protons.
Antworten
-
Helium
-
Oxygen
-
Hydrogen
-
Nitrogen
Frage 14
Frage
The two pure substances: _____ & ____.
Antworten
-
Nuclear Fusion, Nuclear Fission
-
Compound, Element
-
Homogeneous, Heterogeneous
-
Solids, Liquids
Frage 15
Frage
Kool-Aid mix is mixed with water until it dissolves. Which of these is correct?
Antworten
-
Solute = Water Solvent = Kool-Aid
-
Solute = Kool-Aid Solvent = Water
Frage 16
Frage
Stars burn out when they __________.
Antworten
-
run out of oxygen
-
gain to much oxygen
-
run out of hydrogen
-
gain to much hydrogen
Frage 17
Frage
What is the "Universal Solvent"?
Antworten
-
Salt
-
Hydrogen
-
Water
Frage 18
Frage
What are two chemical properties?
Antworten
-
Elements, Compounds
-
Color change, Production of gas
-
Malleability, Hardness
-
None of these
Frage 19
Frage
What is the difference between endothermic and exothermic?
Antworten
-
exothermic = heat taken in endothermic = heat released
-
exothermic = heat released endothermic = heat taken in
-
No difference
Frage 20
Frage
Three exothermic phase changes are?
Antworten
-
Melting
-
Condensation
-
Deposition
-
Evaporating
-
Sublimation
-
Freezing
Frage 21
Frage
Three endothermic phase changes?
Antworten
-
Freezing
-
Melting
-
Sublimation
-
Evaporating
-
Deposition
-
Condensation
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