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