front 1 A molecule is a substance that cannot be broken down into other substances by standard chemical procedures.
| back 1 False |
front 2 Which of the following is a trace element required by most living organisms?
| back 2 Manganese |
front 3 The atoms of different phosphorous isotopes ______________.
| back 3 have different numbers of neutrons |
front 4 Hydrogen bonding is most often seen _____.
| back 4 when hydrogen is covalently bonded to an electronegative atom |
front 5 Chemical equilibrium is reached when the forward and reverse reactions occur at the same rate so that the concentrations of reactants and products remain the same.
| back 5 True |