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15 Cards in this Set

  • Front
  • Back
physical means can be used to separate:
elements
pure substances
mixtures
compounds
mixtures
Group____in the periodic table contains only metals:
2
13
17
18
2
based on their location in periodic table, oxygen and selenium have:
a.the same # of neutrons
b.same conductivity
c.similar properties
d.same number of electron orbitals
c. same properties
which element has properties most similar to those of sodium?
a.boron
b.calcium
c.sulfur
d.nitrogen
b.calcium
based on location on periodic table, you caould infer that ____is very unreactive.
Ca
P
Si
Ar
Ar-Argon because it is a noble gas
based on their location of the periodic table, boron and antimony may be good elements to use as...
semiconductors
fuels
construction materials
catalysts
semiconductors
the vertical column of blocks in the periodic table are called:
period
group
property octet
group
vertical column of blocks on table are called?
group
period
family
octet
period
elements that border the zigzag line in the periodic table are:
inactive
metals
metalloids
nonmetals
metalloids
T/F: Metalloids are generally unreactive.
False.
The reason for organizing, analyzing, and classifying data is
to find telationships among the data
which of tollowing is quantitative?
liquid is blue
liquid boils at 100ºC
liquid tastes bitter
the liquid is cloudy
liquid boils at 100ºC
which is qualitative?
chemical has mass of 2g
the volume is 4.5ml
the liquid is blue and wet
the liquid is blue and wet
the validity of scientific concepts is evaluated by____
testing hypotheses
a theory is an accepted explanation of an observed phenomenon until_____
repeated data and observation conflict whith the theory