256 GROUP V
(c) Give two properties which are characteristic of odd-electron
molecules.
(d) Give the name and formula of a compound in which NO^ ions
are bonded to a metal ion by the donation of electron pairs.
(e) By means of equations, and stating the appropriate conditions,
show how a sample of nitrogen(IV) oxide (nitrogen dioxide)
may be obtained in the laboratory.
(JMB, A)