Chloramine has the chemical formula NH Cl. Nitrogen has five valence electrons, each hydrogen has one valence electron, and chlorine has seven valence electrons. Complete the Lewis structure for this covalent compound.

is there multiple choice answers?

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.  

a chemical change results in a new substance being formed; whereas a physical change will result in a different state of matter

explanation: