Study

CHEM2A

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  • When the prefix milli is used in the metric or SI system, a fundamental unit of measurement is multiplied by what factor?
    10^-6
    10^6
    10^-3
    10^3
  • What is the total length of two pieces of rubber tubing which are 7.69 cm and 4.028 cm in length? Express this answer to the correct number of significant figures.
    12 cm
    11.7 cm
    11.72 cm
    11.718 cm
  • An atom with Z = 26 and A = 58 contains ________ protons and ________ neutrons.
    26; 58
    58; 26
    32; 26
    26; 32
  • Main group elements that are metals usually ________ one or more electrons to form ________, which have a ________ charge.
    lose; anions; negative
    lose; cations; positive
    gain; cations; positive
    gain; anions; negative
  • The volume of a gas sample is recorded as 0.0970 L. How many significant figures is this?
    5
    3
    4
    2
  • The property defined as the energy released on adding an electron to an isolated gas phase atom is _____.
    ionizatino energy
    electronegativity
    atomic number
    electron affinity
  • How many electrons can occupy the shell having n = 2?
    6
    8
    18
    2
  • 95.0°F is the same as:
    85°C
    21°C
    35°C
    171°C
  • If 75.0 g of water at 30.0°C absorbs 900 calories, the new temperature will be:
    18.0°C
    42.0°C
    105°C
    22.0°C
  • An atom containing 47 protons, 47 electrons, and 60 neutrons has a mass number of __.
    94
    107
    60
    47