I have a science project and I chose the topic constellation. NOW my teacher wants me to tell him why I chose that topic cuz he wants to know what would I get from doing this project? And what would a grade 4 kids or student below grade 9 get from this project? He wants to know this. I don't know what to say. hel!! ​

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.  

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