Name oxygen’s only vibration mode and briefly describe its vibrational motion.

Oxygen having only stretching mode of vibration as oxygen is present in form of O-O in which oxygen is bonded to other with single bond or O=O in which double bond is present in them and in O3, a double bond and single bond is present.

Hence, stretching vibration is present along with transitional mode of vibration

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.