Determine the number of resonance structures for the oxalate ion, c2o42−.

2

3

4

oxalate ion does not possess resonance structures, as there is only one lewis structure to describe it.

The oxalate ion have four resonance structures

Explanation:

The Lewis structure is a graphical representation of molecules that shows the electrons and bonds that exist in a particular compound. This representation has been very useful in fields of chemistry as organic and synthetyc chemistry.

One appliance for this Lewis structures is the explanation of unreactivity of some compounds with resonance structures. The more resonance structures, the less reactivity.

In the picture you can see the initial Lewis representation of oxalate ion and their different resonance structures. The general idea is to move electrons from more negative atoms to the less ones but there is no specific rules. To develop the resonance structures it is necessary to practice and practice. Remember: Practice makes perfect.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).