- Given that in the periodic table elements with atomic numbers 2, 10, and 18 are gases
that do not undergo chemical reactions and consist of individual molecules, of the
following, the statement most likely to be true is
A. Elements with atomic numbers 3, 11, and 19 are also likely to be gases.
B. Elements with atomic numbers 3, 11, and 19 would not undergo chemical
reactions.
C. Elements with atomic numbers 10 and 18 would be at opposite ends of the
table.
D. The element with atomic number of 11 may well be an unstable, highly
reactive metal.
E. The properties of elements with atomic number 3, 11, and 19 would have
chemical properties that are much different from each other.- Of the following, the statement that is untrue regarding chemical bonding and
compounds is
A. Chemical bonds occur only in compounds, not in pure elements.
B. Molecules of H 2 are held together by bonds consisting of shared electrons.
C. Ionic compounds consist of charged atoms or groups of atoms.
D. Both pure elemental hydrogen, H 2 , and the compound water, H 2 O, have
covalent bonds.
E. An atom that has more electrons than protons is an anion.- The two atoms represented below
A. Are of different elements.
B. Are atoms of deuterium, a form of hydrogen, H.
C. Are of the same element.D. Are not isotopes of the same element.E. Are of two elements with atomic numbers 6 and 7.52 Green Chemistry, 2nd ed