There are three different possible structures (known as isomers) of a dibromoethene molecule, C 2 H 2 Br 2 . One of them has no net dipole moment, but the other two do. Draw Lewis structures for each of these structures. Include H atoms.

Explanation:

Isomers is any of two or more compounds with the same molecular formula but with different structure.

Structural isomers or constitutional isomer are any of two or more compounds with same molecular formula but different bonding patterns and their atomic organisations (structure).

Make sure to use dots and not only sticks in your representation. Here is the analysis shown in the figure below;

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.