CHEM 121 MODULE 7 EXAM|| QUESTIONS AND ANSWERS - PORTAGE LEARNING.
What are extensive properties? Properties that depend on sample size like mass or
volume.
What are intensive properties? Properties that do NOT depend on sample size like density
or temperature.
What's accuracy? What's precision? Accuracy is how close a measurement is to the true value.
Precision is how close measurements are to each other.
Acronym for diatomic elements Have No Fear Of Ice C(l)old B(r)eer...
H2, N2, F2, O2, I2, Cl2, Br2
What are most common forms of Phosphorous and Sulfur? P4 and S8
What are allotropes? Different forms of the same element, like O2 (oxygen gas) and O3 (ozone)
Name these elements: H, He, Li, Be, B, C Hydrogen, Helium, Lithium, Beryllium, Boron,
Carbon.
Name these elements: N, O, F, Ne, Na, Mg Nitrogen, Oxygen, Fluorine, Neon, Sodium,
Magnesium.
Name these elements: Al, Si, P, S, Cl, Ar Aluminum, Silicon, Phosphorus, Sulfur, Chlorine,
Argon.
,Name these elements: K, Ca, Sc, Ti, V, Cr Potassium, Calcium, Scandium, Titanium,
Vanadium, Chromium.
Name these elements: Mn, Fe, Co, Ni, Cu, Zn Manganese, Iron, Cobalt, Nickel, Copper,
Zinc.
Name these elements: Ga, Ge, As, Se, Br, Kr Gallium, Germanium, Arsenic, Selenium, Bromine,
Krypton.
Name these elements: Ag, Au, Sn, Pb, Hg, W Silver, Gold, Tin, Lead, Mercury, Tungsten.
What are metalloids? Elements that have metal and nonmetal properties...they conduct
electricity but not that well (semiconductors). Like silicon.
Giga (G) 1,000,000,000
Mega (M) 1,000,000
kilo (k) 1,000
deci (d) 0.1
centi (c) 0.01
milli (m) 0.001
micro (μ) or (mc) 0.000001
, nano (n) 0.000000001
What's relative average error? What's relative average deviation? Relative average error refers
to the average difference between a measurement and its true value. Relative average deviation
refers to the average difference of measurements from each other.
A data set is accurate if the average measurements are close to the true value.
What are conversion factors made from? Equality statements...e.g. 2.54 cm. =1 in 1 in.
What are the steps for converting degrees C to degrees F? 1. Convert C to F using the equality
statement/conversion factor 1 C = 1.8 F.
2. Add 32 F to the result of step 1.
What are the steps for converting degrees F to degrees C? 1. Subtract 32 F.
2. Convert F to C using the equality statement/conversion factor 1 C = 1.8 F.
What does it mean that an isotope is stable? It is not radioactive... Po and beyond have
radioactive isotopes.
What does it mean that an atom is fissile? The atom can undergo nuclear fission.
Is there a such thing as a normal isotope? No, for example C-12, C-13, and C-14 are all
isotopes.
What are extensive properties? Properties that depend on sample size like mass or
volume.
What are intensive properties? Properties that do NOT depend on sample size like density
or temperature.
What's accuracy? What's precision? Accuracy is how close a measurement is to the true value.
Precision is how close measurements are to each other.
Acronym for diatomic elements Have No Fear Of Ice C(l)old B(r)eer...
H2, N2, F2, O2, I2, Cl2, Br2
What are most common forms of Phosphorous and Sulfur? P4 and S8
What are allotropes? Different forms of the same element, like O2 (oxygen gas) and O3 (ozone)
Name these elements: H, He, Li, Be, B, C Hydrogen, Helium, Lithium, Beryllium, Boron,
Carbon.
Name these elements: N, O, F, Ne, Na, Mg Nitrogen, Oxygen, Fluorine, Neon, Sodium,
Magnesium.
Name these elements: Al, Si, P, S, Cl, Ar Aluminum, Silicon, Phosphorus, Sulfur, Chlorine,
Argon.
,Name these elements: K, Ca, Sc, Ti, V, Cr Potassium, Calcium, Scandium, Titanium,
Vanadium, Chromium.
Name these elements: Mn, Fe, Co, Ni, Cu, Zn Manganese, Iron, Cobalt, Nickel, Copper,
Zinc.
Name these elements: Ga, Ge, As, Se, Br, Kr Gallium, Germanium, Arsenic, Selenium, Bromine,
Krypton.
Name these elements: Ag, Au, Sn, Pb, Hg, W Silver, Gold, Tin, Lead, Mercury, Tungsten.
What are metalloids? Elements that have metal and nonmetal properties...they conduct
electricity but not that well (semiconductors). Like silicon.
Giga (G) 1,000,000,000
Mega (M) 1,000,000
kilo (k) 1,000
deci (d) 0.1
centi (c) 0.01
milli (m) 0.001
micro (μ) or (mc) 0.000001
, nano (n) 0.000000001
What's relative average error? What's relative average deviation? Relative average error refers
to the average difference between a measurement and its true value. Relative average deviation
refers to the average difference of measurements from each other.
A data set is accurate if the average measurements are close to the true value.
What are conversion factors made from? Equality statements...e.g. 2.54 cm. =1 in 1 in.
What are the steps for converting degrees C to degrees F? 1. Convert C to F using the equality
statement/conversion factor 1 C = 1.8 F.
2. Add 32 F to the result of step 1.
What are the steps for converting degrees F to degrees C? 1. Subtract 32 F.
2. Convert F to C using the equality statement/conversion factor 1 C = 1.8 F.
What does it mean that an isotope is stable? It is not radioactive... Po and beyond have
radioactive isotopes.
What does it mean that an atom is fissile? The atom can undergo nuclear fission.
Is there a such thing as a normal isotope? No, for example C-12, C-13, and C-14 are all
isotopes.
