January 2010 Chemistry Regents #1-10
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1 Which two particles have opposite charges?
(1) an electron and a neutron
(2) an electron and a proton
(3) a proton and a neutron
(4) a proton and a positron
|2 Which statement describes how an atom in the ground
state becomes excited?
(1) The atom absorbs energy, and one or more electrons move to a higher electron shell.
(2) The atom absorbs energy, and one or more electrons move to a lower electron shell.
(3) The atom releases energy, and one or more electrons move to a higher electron shell.
(4) The atom releases energy, and one or more electrons move to a lower electron shell.
|3 An element that has a low first ionization energy and
good conductivity of heat and electricity is classified as a
(1) metal (3) nonmetal
(2) metalloid (4) noble gas
|1||Link||see table S then use the PT to see location|
|4 The chemical properties of calcium are most similar to
the chemical properties of
(1) Ar (3) Mg
(2) K (4) Sc
|5 Which element is a liquid at STP?
(1) argon (3) chlorine
(2) bromine (4) sulfur
|2||Link||bromine and mercury are the only liquids|
|6 Which statement describes a chemical property of
(1) Aluminum is malleable.
(2) Aluminum reacts with sulfuric acid.
(3) Aluminum conducts an electric current.
(4) Aluminum has a density of 2.698 g/cm3 at STP.
|2||Link||chemical properties look for the reaction|
|7 Which element has an atom in the ground state with a
total of three valence electrons?
(1) aluminum (3) phosphorus
(2) lithium (4) scandium
|1||Link||group 13, use PT, last number of electrons|
|8 Which substance can be broken down by chemical means?
(1) magnesium (3) mercury
(2) manganese (4) methanol
|4||Link||definition of a compound
3 wrong answers are elements
|9 The gram-formula mass of NO2 is defined as
the mass of
(1) one mole of NO2
(2) one molecule of NO2
(3) two moles of NO
(4) two molecules of NO
|10 In which type of reaction do two or more substances
combine to produce a single substance?
(3) single replacement
(4) double replacement
|1||Link||A + B ==> AB
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